ARM: OMAP4/5: Make OMAPx_SRAM_SCRATCH_ defines common

These defines are same across OMAP4/5. So move them to
omap_common.h. This is required for the patches that
follow.

Signed-off-by: Sricharan R <r.sricharan@ti.com>
diff --git a/arch/arm/cpu/armv7/omap5/hw_data.c b/arch/arm/cpu/armv7/omap5/hw_data.c
index 5698876..604fa42 100644
--- a/arch/arm/cpu/armv7/omap5/hw_data.c
+++ b/arch/arm/cpu/armv7/omap5/hw_data.c
@@ -41,7 +41,7 @@
 struct vcores_data const **omap_vcores =
 		(struct vcores_data const **) OMAP_SRAM_SCRATCH_VCORES_PTR;
 struct omap_sys_ctrl_regs const **ctrl =
-	(struct omap_sys_ctrl_regs const **)OMAP5_SRAM_SCRATCH_SYS_CTRL;
+	(struct omap_sys_ctrl_regs const **)OMAP_SRAM_SCRATCH_SYS_CTRL;
 
 /* OPP HIGH FREQUENCY for ES2.0 */
 static const struct dpll_params mpu_dpll_params_1_5ghz[NUM_SYS_CLKS] = {