doc/netlink: Allow empty enum-name in ynl specs

Update the ynl schemas to allow the specification of empty enum names
for all enum code generation.
Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20240306231046.97158-6-donald.hunter@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/netlink/genetlink-c.yaml

@@ -126,8 +126,9 @@ properties:
             Prefix for the C enum name of the attributes. Default family[name]-set[name]-a-
           type: string
         enum-name:
-          description: Name for the enum type of the attribute.
-          type: string
+          description: |
+            Name for the enum type of the attribute, if empty no name will be used.
+          type: [ string, "null" ]
         doc:
           description: Documentation of the space.
           type: string
@@ -261,14 +262,16 @@ properties:
           the prefix with the upper case name of the command, with dashes replaced by underscores.
         type: string
       enum-name:
-        description: Name for the enum type with commands.
-        type: string
+        description: |
+          Name for the enum type with commands, if empty no name will be used.
+        type: [ string, "null" ]
       async-prefix:
         description: Same as name-prefix but used to render notifications and events to separate enum.
         type: string
       async-enum:
-        description: Name for the enum type with notifications/events.
-        type: string
+        description: |
+          Name for the enum type with commands, if empty no name will be used.
+        type: [ string, "null" ]
       list:
         description: List of commands
         type: array

Documentation/netlink/genetlink-legacy.yaml

@@ -168,8 +168,9 @@ properties:
             Prefix for the C enum name of the attributes. Default family[name]-set[name]-a-
           type: string
         enum-name:
-          description: Name for the enum type of the attribute.
-          type: string
+          description: |
+            Name for the enum type of the attribute, if empty no name will be used.
+          type: [ string, "null" ]
         doc:
           description: Documentation of the space.
           type: string
@@ -304,14 +305,16 @@ properties:
           the prefix with the upper case name of the command, with dashes replaced by underscores.
         type: string
       enum-name:
-        description: Name for the enum type with commands.
-        type: string
+        description: |
+          Name for the enum type with commands, if empty no name will be used.
+        type: [ string, "null" ]
       async-prefix:
         description: Same as name-prefix but used to render notifications and events to separate enum.
         type: string
       async-enum:
-        description: Name for the enum type with notifications/events.
-        type: string
+        description: |
+          Name for the enum type with commands, if empty no name will be used.
+        type: [ string, "null" ]
       # Start genetlink-legacy
       fixed-header: &fixed-header
         description: |

Documentation/netlink/netlink-raw.yaml

@@ -189,8 +189,9 @@ properties:
             Prefix for the C enum name of the attributes. Default family[name]-set[name]-a-
           type: string
         enum-name:
-          description: Name for the enum type of the attribute.
-          type: string
+          description: |
+            Name for the enum type of the attribute, if empty no name will be used.
+          type: [ string, "null" ]
         doc:
           description: Documentation of the space.
           type: string
@@ -371,14 +372,16 @@ properties:
           the prefix with the upper case name of the command, with dashes replaced by underscores.
         type: string
       enum-name:
-        description: Name for the enum type with commands.
-        type: string
+        description: |
+          Name for the enum type with commands, if empty no name will be used.
+        type: [ string, "null" ]
       async-prefix:
         description: Same as name-prefix but used to render notifications and events to separate enum.
         type: string
       async-enum:
-        description: Name for the enum type with notifications/events.
-        type: string
+        description: |
+          Name for the enum type with commands, if empty no name will be used.
+        type: [ string, "null" ]
       # Start genetlink-legacy
       fixed-header: &fixed-header
         description: |