staging: rtl8187se: Fix indent in switch statement.

Fix indent in switch statement in ieee80211/ieee80211_wx.c.

Fix checkpatch.pl error:
ERROR: switch and case should be at the same indent.
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>