dt-bindings: timer: renesas,cmt: Add R-Car V4M support

dt-bindings: timer: renesas,cmt: Add R-Car V4M support

Document support for the Compare Match Timer Type0 (CMT0) and Type1
(CMT1) in the Renesas R-Car V4M (R8A779H0) SoC.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/3e8a7a93261d8ad264dec2fa2784fe1bbfc4a23c.1712068536.git.geert+renesas@glider.be
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>