The micro SD card slot uses GPIO3_13 as card detect pin, so describe
it in the devicetree.
This was noticed when converting imx53-qsb board to driver model
in U-Boot as the micro SD card was not getting detected.
After this change it is possible to load the dtb and zImage
from the SD card and boot Linux.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Import the imx53-qsb devicetree files from Linux kernel
version 5.11-rc7.
This is in preparation for converting the mx53loco_defconfig
target to driver model.
Signed-off-by: Fabio Estevam <festevam@gmail.com>