b43: use standard fls for finding the most significant bit
Signed-off-by:Rafał Miłecki <zajec5@gmail.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com>
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Signed-off-by:Rafał Miłecki <zajec5@gmail.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com>