dt-bindings: mmc: renesas,sdhi: Document RZ/V2H(P) support

The SD/MMC block on the RZ/V2H(P) ("R9A09G057") SoC is similar to that
of the R-Car Gen3, but it has some differences:
- HS400 is not supported.
- It has additional SD_STATUS register to control voltage,
  power enable and reset.
- It supports fixed address mode.

To accommodate these differences, a SoC-specific 'renesas,sdhi-r9a09g057'
compatible string is added.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240724182119.652080-2-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/renesas,sdhi.yaml

@@ -18,6 +18,7 @@ properties:
           - renesas,sdhi-r7s9210 # SH-Mobile AG5
           - renesas,sdhi-r8a73a4 # R-Mobile APE6
           - renesas,sdhi-r8a7740 # R-Mobile A1
+          - renesas,sdhi-r9a09g057 # RZ/V2H(P)
           - renesas,sdhi-sh73a0  # R-Mobile APE6
       - items:
           - enum:
@@ -66,6 +67,7 @@ properties:
               - renesas,sdhi-r9a07g054 # RZ/V2L
               - renesas,sdhi-r9a08g045 # RZ/G3S
               - renesas,sdhi-r9a09g011 # RZ/V2M
+              - renesas,sdhi-r9a09g057 # RZ/V2H(P)
           - const: renesas,rzg2l-sdhi
 
   reg: