imx: ventana: increase SYS_BOOTM_LEN

Increase SYS_BOOM_LEN from the default 16M in imx6_common to 64M.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/include/configs/gw_ventana.h b/include/configs/gw_ventana.h
index 4f2f323..f80a309 100644
--- a/include/configs/gw_ventana.h
+++ b/include/configs/gw_ventana.h
@@ -38,6 +38,9 @@
 /* NAND */
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
 
+#undef CONFIG_SYS_BOOTM_LEN
+#define CONFIG_SYS_BOOTM_LEN		(64 << 20)
+
 /* I2C Configs */
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC