PCI: imx6: Configure PHY based on Root Complex or Endpoint mode

Pass PHY_MODE_PCIE_EP if the PCI controller operates in Endpoint (EP) mode,
and fix the Root Complex (RC) mode being hardcoded using a drvdata mode
check.

Fixes: 8026f2d ("PCI: imx6: Call common PHY API to set mode, speed, and submode")
Link: https://lore.kernel.org/r/20241119-pci_fixup_addr-v8-6-c4bfa5193288@nxp.com
Signed-off-by: Frank Li <Frank.Li@nxp.com>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>

Author: nxpfrankli

drivers/pci/controller/dwc/pci-imx6.c

@@ -968,7 +968,9 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp)
 			goto err_clk_disable;
 		}
 
-		ret = phy_set_mode_ext(imx_pcie->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_RC);
+		ret = phy_set_mode_ext(imx_pcie->phy, PHY_MODE_PCIE,
+				       imx_pcie->drvdata->mode == DW_PCIE_EP_TYPE ?
+						PHY_MODE_PCIE_EP : PHY_MODE_PCIE_RC);
 		if (ret) {
 			dev_err(dev, "unable to set PCIe PHY mode\n");
 			goto err_phy_exit;