powerpc: ppc4xx: Change from OF_SEPARATE to OF_EMBED

This is necessary, as ppc4xx has the reset vector located at the end
of the U-Boot image. This needs to be flashed to the end of the NOR
flash. Adding the dtb to the main U-Boot image will break booting
on ppc4xx. This patch now embeds the dtb in the U-Boot image instead.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

configs/canyonlands_defconfig

@@ -4,4 +4,4 @@ CONFIG_TARGET_CANYONLANDS=y
 CONFIG_CANYONLANDS=y
 CONFIG_DEFAULT_DEVICE_TREE="canyonlands"
 CONFIG_OF_CONTROL=y
-CONFIG_OF_SEPARATE=y
+CONFIG_OF_EMBED=y

configs/glacier_defconfig

@@ -4,4 +4,4 @@ CONFIG_TARGET_CANYONLANDS=y
 CONFIG_GLACIER=y
 CONFIG_DEFAULT_DEVICE_TREE="glacier"
 CONFIG_OF_CONTROL=y
-CONFIG_OF_SEPARATE=y
+CONFIG_OF_EMBED=y

configs/glacier_ramboot_defconfig

@@ -5,4 +5,4 @@ CONFIG_TARGET_CANYONLANDS=y
 CONFIG_GLACIER=y
 CONFIG_DEFAULT_DEVICE_TREE="glacier"
 CONFIG_OF_CONTROL=y
-CONFIG_OF_SEPARATE=y
+CONFIG_OF_EMBED=y