Staging: rtl8192u: fixed a whitespace coding style issue

Removed additional whitespaces in the r8192U_wx.c file.

Signed-off-by: zhaoxiao <zhaoxiao@uniontech.com>
Link: https://lore.kernel.org/r/20210317033219.621-1-zhaoxiao@uniontech.com


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