iwlwifi: pcie: remove suspend/resume workaround for 9000A devices

We don't support 9000 A-step devices anymore, so we can remove the
suspend/resume workaround.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/pcie/trans.c

@@ -3567,17 +3567,6 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
 
 	IWL_DEBUG_INFO(trans, "HW REV: 0x%0x\n", trans->hw_rev);
 
-	/*
-	 * 9000-series integrated A-step has a problem with suspend/resume
-	 * and sometimes even causes the whole platform to get stuck. This
-	 * workaround makes the hardware not go into the problematic state.
-	 */
-	if (trans->cfg->integrated &&
-	    trans->cfg->device_family == IWL_DEVICE_FAMILY_9000 &&
-	    CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP)
-		iwl_set_bit(trans, CSR_HOST_CHICKEN,
-			    CSR_HOST_CHICKEN_PM_IDLE_SRC_DIS_SB_PME);
-
 #if IS_ENABLED(CONFIG_IWLMVM)
 	trans->hw_rf_id = iwl_read32(trans, CSR_HW_RF_ID);