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/o2dnt-common.h b/include/configs/o2dnt-common.h
index 18714ea..133dc6f 100644
--- a/include/configs/o2dnt-common.h
+++ b/include/configs/o2dnt-common.h
@@ -275,10 +275,8 @@
 #define CONFIG_SYS_INIT_RAM_END		MPC5XXX_SRAM_SIZE
 #endif
 
-/* size in bytes reserved for initial data */
-#define CONFIG_SYS_GBL_DATA_SIZE	128
 #define CONFIG_SYS_GBL_DATA_OFFSET	(CONFIG_SYS_INIT_RAM_END - \
-					 CONFIG_SYS_GBL_DATA_SIZE)
+					 GENERATED_GBL_DATA_SIZE)
 #define CONFIG_SYS_INIT_SP_OFFSET	CONFIG_SYS_GBL_DATA_OFFSET
 
 #define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE