serial: sh-sci: Document SoC specific bindings for r8a7796

Signed-off-by: NHiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/serial/renesas,sci-serial.txt

@@ -31,6 +31,8 @@ Required properties:
     - "renesas,hscif-r8a7794" for R8A7794 (R-Car E2) HSCIF compatible UART.
     - "renesas,scif-r8a7795" for R8A7795 (R-Car H3) SCIF compatible UART.
     - "renesas,hscif-r8a7795" for R8A7795 (R-Car H3) HSCIF compatible UART.
+    - "renesas,scif-r8a7796" for R8A7796 (R-Car M3-W) SCIF compatible UART.
+    - "renesas,hscif-r8a7796" for R8A7796 (R-Car M3-W) HSCIF compatible UART.
     - "renesas,scifa-sh73a0" for SH73A0 (SH-Mobile AG5) SCIFA compatible UART.
     - "renesas,scifb-sh73a0" for SH73A0 (SH-Mobile AG5) SCIFB compatible UART.
     - "renesas,rcar-gen1-scif" for R-Car Gen1 SCIF compatible UART,