configs: imx8m{m,n}_venice_defconfig: add usb support

Enable USB support for host controller and various USB ethernet
devices.

Example usage of USB Mass Storage (UMS) support:
 u-boot=> mmc list
 FSL_SDHC: 0
 FSL_SDHC: 1
 FSL_SDHC: 2 (eMMC)
 u-boot=> ums 0 mmc 2
 UMS: LUN 0, dev mmc 2, hwpart 0, sector 0x0, count 0xe30000

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/include/configs/imx8mm_venice.h b/include/configs/imx8mm_venice.h
index 4b7dcf3..c8ac788 100644
--- a/include/configs/imx8mm_venice.h
+++ b/include/configs/imx8mm_venice.h
@@ -40,6 +40,8 @@
 #define BOOT_TARGET_DEVICES(func) \
 	func(MMC, mmc, 1) \
 	func(MMC, mmc, 2) \
+	func(USB, usb, 0) \
+	func(USB, usb, 1) \
 	func(DHCP, dhcp, na)
 #include <config_distro_bootcmd.h>
 #else