bus: fsl-mc: list more commands as accepted through the ioctl

Add some new MC firmware commands that can be received through the
userspace ioctl interface - *get_max_frame_length and *_get_counter.

Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/20210208170949.3070898-4-ciorneiioana@gmail.com


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