staging: fsl-mc/dpio: Fix incorrect masking

In qbman_swp_alt_fq_state(), we need to mask the fqid value
before converting it to little endian, otherwise we write a
wrong value to hardware when running in big endian mode.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>