PCI: rcar: Shut the PHY down in failpath

If anything fails past phy_init_fn() and the system is a Gen3 with
a PHY, the PHY will be left on and inited. This is caused by the
phy_init_fn, which is in fact a pointer to rcar_pcie_phy_init_gen3()
function, which starts the PHY, yet has no counterpart in the failpath.
Add that counterpart.

Fixes: 517ca93a7159 ("PCI: rcar: Add R-Car gen3 PHY support")
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Wolfram Sang <wsa@the-dreams.de>

drivers/pci/controller/pcie-rcar.c

@@ -1165,7 +1165,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
 	if (rcar_pcie_hw_init(pcie)) {
 		dev_info(dev, "PCIe link down\n");
 		err = -ENODEV;
-		goto err_clk_disable;
+		goto err_phy_shutdown;
 	}
 
 	data = rcar_pci_read_reg(pcie, MACSR);
@@ -1177,7 +1177,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
 			dev_err(dev,
 				"failed to enable MSI support: %d\n",
 				err);
-			goto err_clk_disable;
+			goto err_phy_shutdown;
 		}
 	}
 
@@ -1191,6 +1191,12 @@ err_msi_teardown:
 	if (IS_ENABLED(CONFIG_PCI_MSI))
 		rcar_pcie_teardown_msi(pcie);
 
+err_phy_shutdown:
+	if (pcie->phy) {
+		phy_power_off(pcie->phy);
+		phy_exit(pcie->phy);
+	}
+
 err_clk_disable:
 	clk_disable_unprepare(pcie->bus_clk);