arm: renesas: Add config option for R8A774C0 SoC

Add config support for RZ/G2E (a.k.a R8A774C0) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
diff --git a/arch/arm/mach-rmobile/Kconfig.64 b/arch/arm/mach-rmobile/Kconfig.64
index 0d55b74..84e8955 100644
--- a/arch/arm/mach-rmobile/Kconfig.64
+++ b/arch/arm/mach-rmobile/Kconfig.64
@@ -8,6 +8,9 @@
 config R8A774B1
 	bool "Renesas SoC R8A774B1"
 
+config R8A774C0
+	bool "Renesas SoC R8A774C0"
+
 config R8A774E1
 	bool "Renesas SoC R8A774E1"