PCI: mediatek: Remove the redundant dev->pm_domain check

There is no need to check whether device have a PM domain attached before
calling the PM runtime methods. Remove it.
Signed-off-by: NHonghui Zhang <honghui.zhang@mediatek.com>
[lorenzo.pieralisi@arm.com: commit log changes]
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NRyder Lee <ryder.lee@mediatek.com>

drivers/pci/controller/pcie-mediatek.c

@@ -225,10 +225,8 @@ static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
 
 	clk_disable_unprepare(pcie->free_ck);
 
-	if (dev->pm_domain) {
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
-	}
 }
 
 static void mtk_pcie_port_free(struct mtk_pcie_port *port)
@@ -998,10 +996,8 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
 		pcie->free_ck = NULL;
 	}
 
-	if (dev->pm_domain) {
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
-	}
 
 	/* enable top level clock */
 	err = clk_prepare_enable(pcie->free_ck);
@@ -1013,10 +1009,8 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
 	return 0;
 
 err_free_ck:
-	if (dev->pm_domain) {
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
-	}
 
 	return err;
 }