ARM: Rmobile: Rename CONFIG_RMOBILE to CONFIG_ARCH_RMOBILE

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e6940e6..413d269 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -575,9 +575,11 @@
 	  protocols, dual camera support, optional 3D graphics
 	  and an optional customer programmable secure boot.
 
-config RMOBILE
+config ARCH_RMOBILE
 	bool "Renesas ARM SoCs"
 	select CPU_V7
+	select DM
+	select DM_SERIAL
 
 config TARGET_S32V234EVB
 	bool "Support s32v234evb"