SPEAr: Correct the definition of CONFIG_SYS_MONITOR_BASE

The below text is copy pasted from README
- CONFIG_SYS_MONITOR_BASE:
	Physical start address of boot monitor code (set by
	make config files to be same as the text base address
	(TEXT_BASE) used when linking) - same as
	CONFIG_SYS_FLASH_BASE when booting from flash.

This patch corrects the definition of CONFIG_SYS_MONITOR_BASE and sets it to
TEXT_BASE

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>

include/configs/spear-common.h

@@ -162,8 +162,7 @@
 						"0x4C0000; bootm 0x1600000"
 #endif
 
-#define CONFIG_SYS_MONITOR_BASE			CONFIG_SYS_FLASH_BASE
-#define CONFIG_ENV_ADDR				(CONFIG_SYS_MONITOR_BASE + \
+#define CONFIG_ENV_ADDR				(CONFIG_SYS_FLASH_BASE + \
 						CONFIG_SYS_MONITOR_LEN)
 #elif defined(CONFIG_ENV_IS_IN_NAND)
 /*
@@ -200,6 +199,7 @@
 
 
 #define CONFIG_ENV_SIZE				0x02000
+#define CONFIG_SYS_MONITOR_BASE			CONFIG_SYS_TEXT_BASE
 
 /* Miscellaneous configurable options */
 #define CONFIG_ARCH_CPU_INIT