PCI: mvebu: Use gpio_set_value_cansleep()

We are in a context where we can sleep, and the PCIe reset gpio may be on
an I2C expander.  Use the cansleep() variant when setting the GPIO value.

Tested-by: Willy Tarreau <w@1wt.eu> (Iomega iConnect Kirkwood, MiraBox Armada 370)
Tested-by: Andrew Lunn <andrew@lunn.ch> (D-Link DIR664 Kirkwood)
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> (Armada XP GP)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

drivers/pci/host/pci-mvebu.c

@@ -1111,8 +1111,8 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
 			of_property_read_u32(child, "reset-delay-us",
 					     &reset_udelay);
 
-			gpio_set_value(port->reset_gpio,
-				       (port->reset_active_low) ? 1 : 0);
+			gpio_set_value_cansleep(port->reset_gpio,
+						!!port->reset_active_low);
 			msleep(reset_udelay/1000);
 		}