powerpc/85xx: Bump up the CONFIG_SYS_BOOTM_LEN to 16M on FSL 85xx boards

CONFIG_SYS_BOOTMAPSZ has been 16M on these boards for some time so we
should also allow the kernel image to be up to 16M decompressed.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/MPC8548CDS.h b/include/configs/MPC8548CDS.h
index ececa38..43e2c2e 100644
--- a/include/configs/MPC8548CDS.h
+++ b/include/configs/MPC8548CDS.h
@@ -495,6 +495,7 @@
  * the maximum mapped by the Linux kernel during initialization.
  */
 #define CONFIG_SYS_BOOTMAPSZ	(16 << 20)	/* Initial Memory map for Linux*/
+#define CONFIG_SYS_BOOTM_LEN	(16 << 20)	/* Increase max gunzip size */
 
 #if defined(CONFIG_CMD_KGDB)
 #define CONFIG_KGDB_BAUDRATE	230400	/* speed to run kgdb serial port */