bus: fsl-mc: add .shutdown() op for the bus driver

The fsl-mc bus driver is missing the .shutdown() callback, so add it.
The implementation simply calls the .remove() callback.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Link: https://lore.kernel.org/r/20210715140718.8513-4-laurentiu.tudor@nxp.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>