linux-wandboard

iwlagn: make debug levels more readable

Using the actual shifted constants here allows
one to read and or them more easily.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>