iwlwifi: show current driver status in user readable format

change the display of current driver status bit to user readable format
for better and easier debugging

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>