dt-bindings: reference MC peripheral properties in relevant devices

Several devices can be attached to memory controllers (or memory-mapped
buses), thus they can come with additional controller-specific
properties, e.g. devices wired under Intel IXP4XX bus: cfi-flash,
intel,ixp4xx-compact-flash, NS8250 serial and MAX6369 watchdog.

Referencing Memory Controller or IXP4XX bus peripheral properties fixes
few dtbs_check warnings like:

  intel-ixp42x-gateworks-gw2348.dtb: ide@1,0: Unevaluated properties are not allowed
    ('intel,ixp4xx-eb-ahb-split-transfers', 'intel,ixp4xx-eb-byte-access', ... ' were unexpected)
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230206092624.22922-3-krzysztof.kozlowski@linaro.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/ata/intel,ixp4xx-compact-flash.yaml

@@ -35,6 +35,7 @@ required:
 
 allOf:
   - $ref: pata-common.yaml#
+  - $ref: /schemas/memory-controllers/intel,ixp4xx-expansion-peripheral-props.yaml#
 
 unevaluatedProperties: false
 

Documentation/devicetree/bindings/mtd/mtd-physmap.yaml

@@ -15,6 +15,7 @@ description: |
 
 allOf:
   - $ref: "mtd.yaml#"
+  - $ref: /schemas/memory-controllers/mc-peripheral-props.yaml#
 
 properties:
   compatible:

Documentation/devicetree/bindings/serial/8250.yaml

@@ -11,6 +11,7 @@ maintainers:
 
 allOf:
   - $ref: serial.yaml#
+  - $ref: /schemas/memory-controllers/mc-peripheral-props.yaml#
   - if:
       anyOf:
         - required:

Documentation/devicetree/bindings/watchdog/maxim,max63xx.yaml

@@ -8,6 +8,7 @@ title: Maxim 63xx Watchdog Timers
 
 allOf:
   - $ref: "watchdog.yaml#"
+  - $ref: /schemas/memory-controllers/mc-peripheral-props.yaml#
 
 maintainers:
   - Marc Zyngier <maz@kernel.org>