r8192U_wx.c: style: spaces preferred around operators

fix checkpatch.pl check:

CHECK: spaces required around that <op>
in drivers/staging/rtl8192u/r8192U_wx.c

Signed-off-by: Bruno Raoult <braoult@gmail.com>
Link: https://lore.kernel.org/r/e7298c14538ad7a58720585d019a70f637e0cdb1.1616748922.git.braoult@gmail.com


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