staging: rtl8192u/ieee80211: fix switch case indentation

Make switch and case to be at the same indent. This fixes the
checkpatch error "switch and case should be at the same indent".

Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Link: https://lore.kernel.org/r/20210131131226.16917-1-mail@anirudhrb.com


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