r8192U_wx.c: style: braces all arms of statement

fix checkpatch.pl check:

CHECK: braces {} should be used on all arms of this statement
in drivers/staging/rtl8192u/r8192U_wx.c

Signed-off-by: Bruno Raoult <braoult@gmail.com>
Link: https://lore.kernel.org/r/adbbb5243dca7998a31a786eef277bd85068c63a.1616748922.git.braoult@gmail.com


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