iwlagn: cleanup to remove the reference for 3945

More clean up after driver split

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

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

@@ -1049,7 +1049,6 @@ int iwl_apm_init(struct iwl_priv *priv)
 	/*
 	 * Enable HAP INTA (interrupt from management bus) to
 	 * wake device's PCI Express link L1a -> L0s
-	 * NOTE:  This is no-op for 3945 (non-existant bit)
 	 */
 	iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 				    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);