ColdFire: Provide gzip image size V2 & V3 platforms

Default gzip bootm size is 8MB. Some platforms require
more than 8MB

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
diff --git a/include/configs/M5275EVB.h b/include/configs/M5275EVB.h
index db48d76..210bb2d 100644
--- a/include/configs/M5275EVB.h
+++ b/include/configs/M5275EVB.h
@@ -190,7 +190,8 @@
  * have to be in the first 8 MB of memory, since this is
  * the maximum mapped by the Linux kernel during initialization ??
  */
-#define CONFIG_SYS_BOOTMAPSZ		(8 << 20)	/* Initial mmap for Linux */
+#define CONFIG_SYS_BOOTMAPSZ		(CONFIG_SYS_SDRAM_BASE + (CONFIG_SYS_SDRAM_SIZE << 20))
+#define CONFIG_SYS_BOOTM_LEN		(CONFIG_SYS_SDRAM_SIZE << 20)
 
 /*-----------------------------------------------------------------------
  * FLASH organization