imx: ventana: enable dm support for PCI and FEC ethernet

Enable driver model support for FEC ethernet which allows us to remove
the iomux and board_eth_init function. Replace the toggling of the ethernet
phy reset with dt configuration.

Enable driver model support for PCI which allows us to remove the
eth1000_initialize() call. Additionally enable PCI_INIT_R to scan for
PCI devices on init such as the e1000 that is present on the GW552x.

Convert board_pci_fixup to use dm callback and remove pcidisable env
variable which is not supported for DM_PCI and thus leave PCI always
enabled during init.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/arch/arm/dts/imx6qdl-gw51xx.dtsi b/arch/arm/dts/imx6qdl-gw51xx.dtsi
index 2a21c67..7e28463 100644
--- a/arch/arm/dts/imx6qdl-gw51xx.dtsi
+++ b/arch/arm/dts/imx6qdl-gw51xx.dtsi
@@ -129,6 +129,8 @@
 	pinctrl-0 = <&pinctrl_enet>;
 	phy-mode = "rgmii-id";
 	phy-reset-gpios = <&gpio1 30 GPIO_ACTIVE_LOW>;
+	phy-reset-duration = <10>;
+	phy-reset-post-delay = <100>;
 	status = "okay";
 };