image-overlay: Include initramfs in kernel FIT

Instead of packaging the initramfs separately in the flash image, use
the FIT image that includes kernel+fdt+initramfs.

Change-Id: I0a3315cfc635acbfaf7b603f5dca7da1ddeae1c1
Signed-off-by: Rick Altherr <raltherr@google.com>
diff --git a/meta-phosphor/conf/machine/include/obmc-bsp-common.inc b/meta-phosphor/conf/machine/include/obmc-bsp-common.inc
index f2c9247..988a896 100644
--- a/meta-phosphor/conf/machine/include/obmc-bsp-common.inc
+++ b/meta-phosphor/conf/machine/include/obmc-bsp-common.inc
@@ -20,7 +20,7 @@
 IMAGE_CLASSES += "image_types_uboot"
 
 INITRAMFS_CTYPE ?= "lzma"
-INITRAMFS_FSTYPES += "cpio.${INITRAMFS_CTYPE} cpio.${INITRAMFS_CTYPE}.u-boot"
+INITRAMFS_FSTYPES += "cpio.${INITRAMFS_CTYPE}"
 INITRAMFS_IMAGE = "obmc-phosphor-initramfs"
 
 MACHINE_FEATURES_BACKFILL_CONSIDERED = "qemu-usermode"