configs: Delete obsolete macro, CONFIG_SYS_GBL_DATA_SIZE

CONFIG_SYS_GBL_DATA_SIZE is not used any more.
The size of struct "global_data" is automatically calculated
by asm-offsets. (See lib/asm-offsets.c)

GENERATED_GBL_DATA_SIZE should be used instead of
CONFIG_SYS_GBL_DATA_SIZE.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/include/configs/MERGERBOX.h b/include/configs/MERGERBOX.h
index 3dcea0b..930699b 100644
--- a/include/configs/MERGERBOX.h
+++ b/include/configs/MERGERBOX.h
@@ -121,9 +121,8 @@
 #define CONFIG_SYS_INIT_RAM_LOCK	1
 #define CONFIG_SYS_INIT_RAM_ADDR	0xE6000000 /* Initial RAM address */
 #define CONFIG_SYS_INIT_RAM_SIZE	0x1000 /* End of used area in RAM */
-#define CONFIG_SYS_GBL_DATA_SIZE	0x100 /* num bytes initial data */
 #define CONFIG_SYS_GBL_DATA_OFFSET	(CONFIG_SYS_INIT_RAM_SIZE -\
-					 CONFIG_SYS_GBL_DATA_SIZE)
+					 GENERATED_GBL_DATA_SIZE)
 
 /*
  * Local Bus Configuration & Clock Setup