omap3evm: Use GENERATED_GBL_DATA_SIZE

The macro CONFIG_SYS_GBL_DATA_SIZE has been replaced
with GENERATED_GBL_DATA_SIZE.

Also define macros: CONFIG_SYS_INIT_RAM_ADDR and
CONFIG_SYS_INIT_RAM_SIZE.

Based on changes for omap3_beagle in the commit:
 31bfcf1c5776df3d90286aa15104c45096d53dc6

Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

include/configs/omap3_evm.h

@@ -330,7 +330,11 @@ extern unsigned int boot_flash_type;
  * Support for relocation
  */
 #define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
-#define CONFIG_SYS_INIT_SP_ADDR		(LOW_LEVEL_SRAM_STACK - CONFIG_SYS_GBL_DATA_SIZE)
+#define CONFIG_SYS_INIT_RAM_ADDR	0x4020f800
+#define CONFIG_SYS_INIT_RAM_SIZE	0x800
+#define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_INIT_RAM_ADDR + \
+					 CONFIG_SYS_INIT_RAM_SIZE - \
+					 GENERATED_GBL_DATA_SIZE)
 
 /*
  * Define the board revision statically