dt-bindings: clock: st: flexgen: add new introduced compatible

New compatible are added, supporting various kind of flexgen in
STiH407, STiH410 and STiH418
Signed-off-by: Alain Volmat <avolmat@me.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210331201632.24530-4-avolmat@me.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/st/st,flexgen.txt

@@ -64,6 +64,16 @@ Required properties:
   audio use case)
   "st,flexgen-video", "st,flexgen" (enable clock propagation on parent
 					and activate synchronous mode)
+  "st,flexgen-stih407-a0"
+  "st,flexgen-stih410-a0"
+  "st,flexgen-stih407-c0"
+  "st,flexgen-stih410-c0"
+  "st,flexgen-stih418-c0"
+  "st,flexgen-stih407-d0"
+  "st,flexgen-stih410-d0"
+  "st,flexgen-stih407-d2"
+  "st,flexgen-stih418-d2"
+  "st,flexgen-stih407-d3"
 
 - #clock-cells : from common clock binding; shall be set to 1 (multiple clock
   outputs).