iwlwifi: kill bus_is_pm_supported

Get this information from the transport layer which is now in charge
of the APM too.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
index c9fe888..8ebb5a5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -676,6 +676,7 @@
 		dev_printk(KERN_INFO, trans->dev,
 			   "L1 Disabled; Enabling L0S\n");
 	}
+	trans->pm_support = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
 }
 
 /*