staging: mt7621-pci: don't return if get gpio fails

In some platforms gpio's are not used for reset but
for other purposes. Because of that when we try to
get them are valid gpio's but are already assigned
to do other function. To avoid those kind of problems
in those platforms just notice the fail in the kernel
but continue doing normal boot.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200319161416.19033-1-sergio.paracuellos@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-pci/pci-mt7621.c

@@ -363,10 +363,8 @@ static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie,
 
 	port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
 						       GPIOD_OUT_LOW);
-	if (IS_ERR(port->gpio_rst)) {
-		dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot);
-		return PTR_ERR(port->gpio_rst);
-	}
+	if (IS_ERR(port->gpio_rst))
+		dev_notice(dev, "Failed to get GPIO for PCIe%d\n", slot);
 
 	port->slot = slot;
 	port->pcie = pcie;