iwlwifi: add led debugfs function

Adding debugfs file to show current led blinking rate
/sys/kernel/debug/ieee80211/phy0/iwlagn/data/led

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>
2 files changed