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/configs/gwventana_emmc_defconfig b/configs/gwventana_emmc_defconfig
index 97b39b6..6e3aebb 100644
--- a/configs/gwventana_emmc_defconfig
+++ b/configs/gwventana_emmc_defconfig
@@ -34,6 +34,7 @@
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_MISC_INIT_R=y
+CONFIG_PCI_INIT_R=y
 CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_FIT_IMAGE_TINY=y
@@ -85,9 +86,13 @@
 CONFIG_FSL_USDHC=y
 CONFIG_MTD=y
 CONFIG_PHYLIB=y
+CONFIG_DM_ETH=y
+CONFIG_DM_MDIO=y
 CONFIG_E1000=y
+CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_PCI=y
+CONFIG_DM_PCI=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
 CONFIG_DM_REGULATOR=y