staging: rt8192u: Move constant in comparison to the RHS

Fixes checkpatch warning:

WARNING: Comparisons should place the constant on the right side of the test

Signed-off-by: Simone Serra <serrazimone@gmail.com>
Link: https://lore.kernel.org/r/20210223234102.15784-1-serrazimone@gmail.com


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