rt2x00: checkpatch.pl error fixes for rt2x00queue.c

rt2x00queue.c:804: ERROR: space prohibited after that open parenthesis '('
rt2x00queue.c:805: ERROR: space prohibited before that close parenthesis ')'

Signed-off-by: Mark Einon <mark.einon@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>