arm: rmobile: r8a7791: Add support ES2 revision

There is ES2 is a new revision to R8A7791.
This adds support this revision.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/include/asm/arch-rmobile/r8a7791.h b/arch/arm/include/asm/arch-rmobile/r8a7791.h
index 7c8f19c..4791825 100644
--- a/arch/arm/include/asm/arch-rmobile/r8a7791.h
+++ b/arch/arm/include/asm/arch-rmobile/r8a7791.h
@@ -46,4 +46,8 @@
 #define DBSC3_1_QOS_W14_BASE	0xE67A2E00
 #define DBSC3_1_QOS_W15_BASE	0xE67A2F00
 
+#define R8A7791_CUT_ES2X	2
+#define IS_R8A7791_ES2()	\
+	(rmobile_get_cpu_rev_integer() == R8A7791_CUT_ES2X)
+
 #endif /* __ASM_ARCH_R8A7791_H */