PCI: qcom-ep: Setup PHY to work in EP mode

Call phy_set_mode_ext() to notify the PHY driver that the PHY is being
used in the EP mode.

Reviewed-by: Manivannan Sadhasivam <[e-mail]>
Reviewed-by: Jingoo Han <[e-mail]>
Reviewed-by: Johan Hovold <[e-mail]>
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Acked-by: Lorenzo Pieralisi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/pci/controller/dwc/pcie-qcom-ep.c

···
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/mfd/syscon.h>
+#include <linux/phy/pcie.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
···
 	ret = phy_init(pcie_ep->phy);
 	if (ret)
 		goto err_disable_clk;
+
+	ret = phy_set_mode_ext(pcie_ep->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_EP);
+	if (ret)
+		goto err_phy_exit;
 
 	ret = phy_power_on(pcie_ep->phy);
 	if (ret)