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/luan.h b/include/configs/luan.h
index d801404..60ebafb 100644
--- a/include/configs/luan.h
+++ b/include/configs/luan.h
@@ -80,9 +80,9 @@
  * Initial RAM & stack pointer (placed in SDRAM)
  *----------------------------------------------------------------------*/
 #define CONFIG_SYS_INIT_RAM_ADDR	CONFIG_SYS_ISRAM_BASE
-#define CONFIG_SYS_INIT_RAM_END	(8 << 10)
+#define CONFIG_SYS_INIT_RAM_SIZE	(8 << 10)
 #define CONFIG_SYS_GBL_DATA_SIZE	256		/* 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
 
 /*-----------------------------------------------------------------------