board: tbs2910: Fix BOOTMAPSZ

The linux kernel imx_v6_v7_defconfig sets the user/kernel memory split
to 3G/1G now (was 2G/2G before). We have to adapt the BOOTMAPSZ so that
the decompressor finds zImage and dtb in lowmem.

Signed-off-by: Soeren Moch <smoch@web.de>

include/configs/tbs2910.h

@@ -39,7 +39,7 @@
 #define CONFIG_SYS_MEMTEST_END \
 	(CONFIG_SYS_MEMTEST_START + 500 * 1024 * 1024)
 
-#define CONFIG_SYS_BOOTMAPSZ		0x6C000000
+#define CONFIG_SYS_BOOTMAPSZ		0x10000000
 
 /* Serial console */
 #define CONFIG_MXC_UART