staging: rtl8192u: r8192U_core: whitespace neatening to fix consistent spacing code style errors

Clean-up the file by using a cleaner spacing around symbols and
words. Mostly use the automatic checkpatch whitespacing fixes.
This takes care of the consistent spacing errors reported by
checkpatch.
Signed-off-by: Raphaël Beamonte <raphael.beamonte@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>