arm64: renesas: Add Renesas R8A77995 Kconfig support

Add a configuration option for the R-Car D3 SoC.

Note that r8a77995 is the first Renesas "r8a<n>" SoC using a 5 digit
number in its Kconfig symbol, as r8a77990 will be a different SoC.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm64/Kconfig.platforms

@@ -184,6 +184,12 @@ config ARCH_R8A7796
 	help
 	  This enables support for the Renesas R-Car M3-W SoC.
 
+config ARCH_R8A77995
+	bool "Renesas R-Car D3 SoC Platform"
+	depends on ARCH_RENESAS
+	help
+	  This enables support for the Renesas R-Car D3 SoC.
+
 config ARCH_STRATIX10
 	bool "Altera's Stratix 10 SoCFPGA Family"
 	help