linux-phytec-fsl

ARM: pxa: dts: fix mmc controller compatible string

The vendor prefix was renamed from "mrvl" to "marvell". Follow this
change in the dts file.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>