dt-bindings: arm: Document Renesas V3MSK and Wheat board part numbers

The DT binding documentation for the Renesas V3MSK and Wheat boards
lacked board part numbers.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[simon: corrected Wheat part number]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Documentation/devicetree/bindings/arm/shmobile.txt

@@ -120,9 +120,9 @@ Boards:
     compatible = "renesas,sk-rzg1m", "renesas,r8a7743"
   - Stout (ADAS Starterkit, Y-R-CAR-ADAS-SKH2-BOARD)
     compatible = "renesas,stout", "renesas,r8a7790"
-  - V3MSK
+  - V3MSK (Y-ASK-RCAR-V3M-WS10)
     compatible = "renesas,v3msk", "renesas,r8a77970"
-  - Wheat
+  - Wheat (RTP0RC7792ASKB0000JE)
     compatible = "renesas,wheat", "renesas,r8a7792"