pci: pci_mvebu: Add support for reset-gpios

Release PERST# signal via GPIO when "reset-gpios" is defined in device tree.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 436acca..22f4995 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -301,6 +301,7 @@
 	depends on (ARCH_KIRKWOOD || ARCH_MVEBU)
 	select MISC
 	select DM_RESET
+	select DM_GPIO
 	help
 	  Say Y here if you want to enable PCIe controller support on
 	  Kirkwood and Armada 370/XP/375/38x SoCs.