ARM: DRA72x: Add Silicon ID support

Add silicon ID code for DRA722 silicon.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Tom Rini <trini@ti.com>
diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h
index 729723a..d1dd4b5 100644
--- a/arch/arm/include/asm/omap_common.h
+++ b/arch/arm/include/asm/omap_common.h
@@ -645,6 +645,7 @@
 /* DRA7XX */
 #define DRA752_ES1_0	0x07520100
 #define DRA752_ES1_1	0x07520110
+#define DRA722_ES1_0	0x07220100
 
 /*
  * SRAM scratch space entries