Rename CONFIG_SYS_INIT_RAM_END into CONFIG_SYS_INIT_RAM_SIZE

CONFIG_SYS_INIT_RAM_END was a misnomer as it suggests this might be
some end address; to make the meaning more clear we rename it into
CONFIG_SYS_INIT_RAM_SIZE

No other code changes are performed in this patch, only minor editing
of white space (due to the changed length) and the comments was done,
where noticed.

Note that the code for the PATI and cmi_mpc5xx board configurations
looks seriously broken.  Last known maintainers on Cc:

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Denis Peter <d.peter@mpl.ch>
Cc: Martin Winistoerfer <martinwinistoerfer@gmx.ch>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/sbc8548.h b/include/configs/sbc8548.h
index 0ddd20d..ff0a7db 100644
--- a/include/configs/sbc8548.h
+++ b/include/configs/sbc8548.h
@@ -321,12 +321,12 @@
 
 #define CONFIG_SYS_INIT_RAM_LOCK	1
 #define CONFIG_SYS_INIT_RAM_ADDR	0xe4010000	/* Initial RAM address */
-#define CONFIG_SYS_INIT_RAM_END	0x4000		/* End of used area in RAM */
+#define CONFIG_SYS_INIT_RAM_SIZE	0x4000		/* Size of used area in RAM */
 
 #define CONFIG_SYS_INIT_L2_ADDR	0xf8f80000	/* relocate boot L2SRAM */
 
 #define CONFIG_SYS_GBL_DATA_SIZE	128		/* num bytes initial data */
-#define CONFIG_SYS_GBL_DATA_OFFSET	(CONFIG_SYS_INIT_RAM_END - CONFIG_SYS_GBL_DATA_SIZE)
+#define CONFIG_SYS_GBL_DATA_OFFSET	(CONFIG_SYS_INIT_RAM_SIZE - CONFIG_SYS_GBL_DATA_SIZE)
 #define CONFIG_SYS_INIT_SP_OFFSET	CONFIG_SYS_GBL_DATA_OFFSET
 
 /*