wl1271: bugfix: use bitwise-AND instead of logical-AND

typo - while looking for specific bits we should do a bitwise-AND instead of logical-AND.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Acked-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>