ARMV7: OMAP: Fix build after introduction of GENERATED_GBL_DATA_SIZE

This patch fixes the issue by defining and using CONFIG_SYS_INIT_RAM_SIZE and
CONFIG_SYS_INIT_RAM_ADDR. Based on an email discussion with Wolfgang Denk and
Heiko Schocher.

Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/include/configs/igep0020.h b/include/configs/igep0020.h
index 16d9279..a970ad2 100644
--- a/include/configs/igep0020.h
+++ b/include/configs/igep0020.h
@@ -222,6 +222,10 @@
 #endif /* (CONFIG_CMD_NET) */
 
 #define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
-#define CONFIG_SYS_INIT_SP_ADDR		(LOW_LEVEL_SRAM_STACK - GENERATED_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)
 
 #endif /* __CONFIG_H */