arm: dts: include gpio nodes for card detect

Several MMC drivers use GPIO for card detection with cd-gpios property in
the MMC node pointing to a GPIO node. However, as U-Boot tries to save
space by keeping only required nodes using u-boot* properties, several
devices tree result in having only in the MMC node but not the GPIO node
associated to cd-gpios.

This patch, fixes several ocurrence of this issue.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Adam Ford <aford173@gmail.com> #da850-evm