linux-wandboard

iwlwifi: remove device type checking for tx power in debugfs

Instead of checking device type for enable/disable tx power control,
move it to .cfg for better control and more flexibilities.

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