iwlagn: change Copyright to 2011

drivers/net/wireless/iwlwifi/iwl-1000.c

drivers/net/wireless/iwlwifi/iwl-2000.c

drivers/net/wireless/iwlwifi/iwl-5000-hw.h

drivers/net/wireless/iwlwifi/iwl-5000.c

drivers/net/wireless/iwlwifi/iwl-6000-hw.h

drivers/net/wireless/iwlwifi/iwl-6000.c

drivers/net/wireless/iwlwifi/iwl-agn-calib.c

drivers/net/wireless/iwlwifi/iwl-agn-calib.h

drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c

drivers/net/wireless/iwlwifi/iwl-agn-debugfs.h

drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c

drivers/net/wireless/iwlwifi/iwl-agn-hcmd.c

drivers/net/wireless/iwlwifi/iwl-agn-hw.h

drivers/net/wireless/iwlwifi/iwl-agn-ict.c

drivers/net/wireless/iwlwifi/iwl-agn-led.c

drivers/net/wireless/iwlwifi/iwl-agn-led.h

drivers/net/wireless/iwlwifi/iwl-agn-lib.c

drivers/net/wireless/iwlwifi/iwl-agn-rs.c

drivers/net/wireless/iwlwifi/iwl-agn-rs.h

drivers/net/wireless/iwlwifi/iwl-agn-rxon.c