PCI: dwc: Use dev_info for PCIe link down event logging

Some of the platforms (like Tegra194 and Tegra234) have open slots and
not having an endpoint connected to the slot is not an error.
So, changing the macro from dev_err to dev_info to log the event.

Link: https://lore.kernel.org/r/20220913101237.4337-1-vidyas@nvidia.comTested-by: NJon Hunter <jonathanh@nvidia.com>
Signed-off-by: NVidya Sagar <vidyas@nvidia.com>
Signed-off-by: NLorenzo Pieralisi <lpieralisi@kernel.org>
Acked-by: NJon Hunter <jonathanh@nvidia.com>
Acked-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

drivers/pci/controller/dwc/pcie-designware.c

@@ -448,7 +448,7 @@ int dw_pcie_wait_for_link(struct dw_pcie *pci)
 	}
 
 	if (retries >= LINK_WAIT_MAX_RETRIES) {
-		dev_err(pci->dev, "Phy link never came up\n");
+		dev_info(pci->dev, "Phy link never came up\n");
 		return -ETIMEDOUT;
 	}