arm64: add Renesas R8A77965 support

Add configuration option for the R-Car M3-N (R8A77965) SoC.
Signed-off-by: NJacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm64/Kconfig.platforms

@@ -190,6 +190,12 @@ config ARCH_R8A7796
 	help
 	  This enables support for the Renesas R-Car M3-W SoC.
 
+config ARCH_R8A77965
+	bool "Renesas R-Car M3-N SoC Platform"
+	depends on ARCH_RENESAS
+	help
+	  This enables support for the Renesas R-Car M3-N SoC.
+
 config ARCH_R8A77970
 	bool "Renesas R-Car V3M SoC Platform"
 	depends on ARCH_RENESAS