uboot-phytec

MLK-14608 fsl_esdhc: Fix wp_enable issue

The wp-gpios property is used for gpio, if this is set, the WP pin is muxed
to gpio function, can't be used as internal WP checking.

This patch changes to examine the "fsl,wp-controller" for using internal WP checking. And
wp-gpios for using gpio pin.

Signed-off-by: Ye Li <ye.li@nxp.com>