ARM: rmobile: Add support R-Car Generation 3

This adds supporting R-Car Generation 3 (Gen3) as Renesas ARM64 SoC.

Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/mach-rmobile/Kconfig b/arch/arm/mach-rmobile/Kconfig
index 56c3f68..4b05d78 100644
--- a/arch/arm/mach-rmobile/Kconfig
+++ b/arch/arm/mach-rmobile/Kconfig
@@ -8,8 +8,13 @@
 	bool "Renesas ARM SoCs R-Car Gen1/Gen2 (32bit)"
 	select CPU_V7
 
+config RCAR_GEN3
+	bool "Renesas ARM SoCs R-Car Gen3 (64bit)"
+	select ARM64
+
 endchoice
 
 source "arch/arm/mach-rmobile/Kconfig.32"
+source "arch/arm/mach-rmobile/Kconfig.64"
 
 endif