Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated value

CONFIG_SYS_GBL_DATA_SIZE has always been just a bad workarond for not
being able to use "sizeof(struct global_data)" in assembler files.
Recent experience has shown that manual synchronization is not
reliable enough.  This patch renames CONFIG_SYS_GBL_DATA_SIZE into
GENERATED_GBL_DATA_SIZE which gets automatically generated by the
asm-offsets tool.  In the result, all definitions of this value can be
deleted from the board config files.  We have to make sure that all
files that reference such data include the new <asm-offsets.h> file.

No other changes have been done yet, but it is obvious that similar
changes / simplifications can be done for other, related macro
definitions as well.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/HIDDEN_DRAGON.h b/include/configs/HIDDEN_DRAGON.h
index 592f4d2..c684cb8 100644
--- a/include/configs/HIDDEN_DRAGON.h
+++ b/include/configs/HIDDEN_DRAGON.h
@@ -127,19 +127,17 @@
 #define CONFIG_SYS_RAMBOOT		1
 #define CONFIG_SYS_INIT_RAM_ADDR	(CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
 #define CONFIG_SYS_INIT_RAM_SIZE	0x10000
-#define CONFIG_SYS_GBL_DATA_SIZE	256  /* size in bytes reserved for initial data */
-#define CONFIG_SYS_GBL_DATA_OFFSET	(CONFIG_SYS_INIT_RAM_SIZE - CONFIG_SYS_GBL_DATA_SIZE)
+#define CONFIG_SYS_GBL_DATA_OFFSET	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
 #define CONFIG_SYS_INIT_SP_OFFSET	CONFIG_SYS_GBL_DATA_OFFSET
 #else
 #undef	CONFIG_SYS_RAMBOOT
 #define CONFIG_SYS_MONITOR_LEN		0x00030000
 #define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
 
-#define CONFIG_SYS_GBL_DATA_SIZE	128
 
 #define CONFIG_SYS_INIT_RAM_ADDR     0x40000000
 #define CONFIG_SYS_INIT_RAM_SIZE      0x1000
-#define CONFIG_SYS_GBL_DATA_OFFSET  (CONFIG_SYS_INIT_RAM_SIZE - CONFIG_SYS_GBL_DATA_SIZE)
+#define CONFIG_SYS_GBL_DATA_OFFSET  (CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
 
 #endif