Set console speed to 115200 on mx6cuboxi.

By default, u-boot itself outputs on the serial console at 115200, so
it may as well pass the same value to the booted operating system as
well.

Signed-off-by: Vagrant Cascadian <vagrant@debian.org>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>

include/configs/mx6cuboxi.h

@@ -84,7 +84,7 @@
 	"initrd_high=0xffffffff\0" \
 	"fdt_high=0xffffffff\0" \
 	"ip_dyn=yes\0" \
-	"console=" CONSOLE_DEV "\0" \
+	"console=" CONSOLE_DEV ",115200\0" \
 	"bootm_size=0x10000000\0" \
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
 	"update_sd_firmware=" \