PCI: keystone: Do not treat link up message as error

The "Link already up" message does not indicate any error, so
change it to dev_info() level instead.
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NMurali Karicheri <m-karicheri2@ti.com>

drivers/pci/dwc/pci-keystone.c

@@ -89,7 +89,7 @@ static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
 	dw_pcie_setup_rc(pp);
 
 	if (dw_pcie_link_up(pci)) {
-		dev_err(dev, "Link already up\n");
+		dev_info(dev, "Link already up\n");
 		return 0;
 	}