Revert "dm: arm: rpi: Drop CONFIG_OF_EMBED"

This reverts commit 25877d4e.

This is a workaround for Raspberry Pi boot failures seen when passing on
the device tree provided by the Raspberry Pi firmware at boot. Without
CONFIG_OF_EMBED, we just get stuck at "Starting kernel ..." when we try
to boot Linux with this device tree.

Signed-off-by: Paul Barker <pbarker@toganlabs.com>
Cc: Simon Glass <sjg@chromium.org>
Tested-by: Jonathan Gray <jsg@jsg.id.au>
Reviewed-by: Simon Glass <sjg@chromium.org>

configs/rpi_2_defconfig

@@ -16,6 +16,7 @@ CONFIG_CMD_USB=y
 CONFIG_ENV_FAT_INTERFACE="mmc"
 CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_DM_KEYBOARD=y
+CONFIG_OF_EMBED=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y

configs/rpi_3_32b_defconfig

@@ -17,6 +17,7 @@ CONFIG_CMD_USB=y
 CONFIG_ENV_FAT_INTERFACE="mmc"
 CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_DM_KEYBOARD=y
+CONFIG_OF_EMBED=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y

configs/rpi_3_defconfig

@@ -17,6 +17,7 @@ CONFIG_CMD_USB=y
 CONFIG_ENV_FAT_INTERFACE="mmc"
 CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_DM_KEYBOARD=y
+CONFIG_OF_EMBED=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y

configs/rpi_defconfig

@@ -16,6 +16,7 @@ CONFIG_CMD_USB=y
 CONFIG_ENV_FAT_INTERFACE="mmc"
 CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_DM_KEYBOARD=y
+CONFIG_OF_EMBED=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y