dt-bindings: soc: renesas: renesas-soc: Add pattern for gray-hawk

Add a pattern for the Renesas Gray Hawk Single board (based on the R-Car
V4M SoC).

Signed-off-by: Lad Prabhakar <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Geert Uytterhoeven <[e-mail]>

Documentation/devicetree/bindings/soc/renesas/renesas-soc.yaml

···
       anyOf:
         # Preferred naming style for compatibles of SoC components
         - pattern: "^renesas,(emev2|r(7s|8a|9a)[a-z0-9]+|rcar|rmobile|rz[a-z0-9]*|sh(7[a-z0-9]+)?|mobile)-[a-z0-9-]+$"
-        - pattern: "^renesas,(condor|falcon|gr-peach|salvator|sk-rz|smar(c(2)?)?|spider|white-hawk)(.*)?$"
+        - pattern: "^renesas,(condor|falcon|gr-peach|gray-hawk|salvator|sk-rz|smar(c(2)?)?|spider|white-hawk)(.*)?$"
 
         # Legacy compatibles
         #