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/mpc7448hpc2.h b/include/configs/mpc7448hpc2.h
index 94a8c93..1ab58ad 100644
--- a/include/configs/mpc7448hpc2.h
+++ b/include/configs/mpc7448hpc2.h
@@ -221,10 +221,10 @@
  */
 #undef  CONFIG_SYS_INIT_RAM_LOCK
 #define CONFIG_SYS_INIT_RAM_ADDR	0x07d00000	/* unused memory region */
-#define CONFIG_SYS_INIT_RAM_END	0x4000/* larger space - we have SDRAM initialized */
+#define CONFIG_SYS_INIT_RAM_SIZE	0x4000/* larger space - we have SDRAM initialized */
 
 #define CONFIG_SYS_GBL_DATA_SIZE	128/* size in bytes reserved for init 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)
 
 /*-----------------------------------------------------------------------
  * Start addresses for the final memory configuration