rpi_0_w: Add configs consistent with RpI3

CONFIG_OF_EMBED in particular is needed to allow the Raspberry Pi
firmware to pass the DTB to U-Boot and on to the kernel.

Signed-off-by: Drew Moseley <drew.moseley@northern.tech>
diff --git a/configs/rpi_0_w_defconfig b/configs/rpi_0_w_defconfig
index 9a6d24b..1248294 100644
--- a/configs/rpi_0_w_defconfig
+++ b/configs/rpi_0_w_defconfig
@@ -12,14 +12,21 @@
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_OF_EMBED=y
+CONFIG_ENV_FAT_INTERFACE="mmc"
+CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
+CONFIG_DM_KEYBOARD=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y
 CONFIG_DM_ETH=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
+CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
+CONFIG_USB_HOST_ETHER=y
+CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
 CONFIG_SYS_WHITE_ON_BLACK=y
 CONFIG_CONSOLE_SCROLL_LINES=10