mmc: fsl_esdhc: move 'status' property fixup into a weak function

Move fdt fixup of 'status' property into a weak function. This allows
board to define 'status' fdt fixup by themselves.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>