iwlwifi: move agn only eeprom functions to separate file

Some of the functions in iwl-eeprom.c file are for agn devices only,
Those functions do not have to be part of iwlcore.ko, so move those
to iwl-agn-eeprom.c file.

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

drivers/net/wireless/iwlwifi/Makefile

@@ -12,7 +12,7 @@ obj-$(CONFIG_IWLAGN)	+= iwlagn.o
 iwlagn-objs		:= iwl-agn.o iwl-agn-rs.o iwl-agn-led.o iwl-agn-ict.o
 iwlagn-objs		+= iwl-agn-ucode.o iwl-agn-hcmd.o iwl-agn-tx.o
 iwlagn-objs		+= iwl-agn-lib.o iwl-agn-rx.o iwl-agn-calib.o
-iwlagn-objs		+= iwl-agn-tt.o iwl-agn-sta.o
+iwlagn-objs		+= iwl-agn-tt.o iwl-agn-sta.o iwl-agn-eeprom.o
 iwlagn-$(CONFIG_IWLWIFI_DEBUGFS) += iwl-agn-debugfs.o
 
 iwlagn-$(CONFIG_IWL4965) += iwl-4965.o