ASoC: dt-bindings: renesas,rz-ssi: Document RZ/G2UL SoC

Document RZ/G2U2L SSI bindings. RZ/G2UL SSI is identical to one found
on the RZ/G2L SoC. No driver changes are required as generic compatible
string "renesas,rz-ssi" will be used as a fallback.

While at it add a '.' at the end of dmas description for the first cell.
Signed-off-by: NBiju Das <biju.das.jz@bp.renesas.com>
Acked-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20220607124231.3248-1-biju.das.jz@bp.renesas.comSigned-off-by: NMark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/renesas,rz-ssi.yaml

@@ -13,6 +13,7 @@ properties:
   compatible:
     items:
       - enum:
+          - renesas,r9a07g043-ssi  # RZ/G2UL
           - renesas,r9a07g044-ssi  # RZ/G2{L,LC}
           - renesas,r9a07g054-ssi  # RZ/V2L
       - const: renesas,rz-ssi
@@ -50,7 +51,7 @@ properties:
     minItems: 1
     maxItems: 2
     description:
-      The first cell represents a phandle to dmac
+      The first cell represents a phandle to dmac.
       The second cell specifies the encoded MID/RID values of the SSI port
       connected to the DMA client and the slave channel configuration
       parameters.