iwlwifi: move ucode related function to iwl-agn-ucode.c

Cleanup the code and move all the uCode related functions specific to _agn
devices to iwl-agn-ucode.c

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