ARM: DRA7: Add is_dra72x cpu check definition

A generic is_dra72x cpu check is useful for grouping
all the revisions under that. This is used in the
subsequent patches.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/include/asm/omap_common.h

@@ -622,12 +622,19 @@ static inline u8 is_omap54xx(void)
 }
 
 #define DRA7XX		0x07000000
+#define DRA72X		0x07200000
 
 static inline u8 is_dra7xx(void)
 {
 	extern u32 *const omap_si_rev;
 	return ((*omap_si_rev & 0xFF000000) == DRA7XX);
 }
+
+static inline u8 is_dra72x(void)
+{
+	extern u32 *const omap_si_rev;
+	return (*omap_si_rev & 0xFFF00000) == DRA72X;
+}
 #endif
 
 /*