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/io.h b/include/configs/io.h
index 7f86767..9da6cc6 100644
--- a/include/configs/io.h
+++ b/include/configs/io.h
@@ -198,9 +198,8 @@
 #define CONFIG_SYS_INIT_RAM_ADDR	CONFIG_SYS_OCM_DATA_ADDR /* in SDRAM */
 #define CONFIG_SYS_INIT_RAM_END	CONFIG_SYS_OCM_DATA_SIZE /* End of used area */
 
-#define CONFIG_SYS_GBL_DATA_SIZE	128  /* size/bytes res'd for init data*/
 #define CONFIG_SYS_GBL_DATA_OFFSET \
-	(CONFIG_SYS_INIT_RAM_END - CONFIG_SYS_GBL_DATA_SIZE)
+	(CONFIG_SYS_INIT_RAM_END - GENERATED_GBL_DATA_SIZE)
 #define CONFIG_SYS_INIT_SP_OFFSET	CONFIG_SYS_GBL_DATA_OFFSET
 
 /*