Build full phosphor rootfs into witherspoon-tacoma

Change-Id: I99fbb239485749b8dd7917313edcb0d620dced67
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-witherspoon/conf/machine/witherspoon-tacoma.conf b/meta-witherspoon/conf/machine/witherspoon-tacoma.conf
index 98d1978..bbee6ad 100644
--- a/meta-witherspoon/conf/machine/witherspoon-tacoma.conf
+++ b/meta-witherspoon/conf/machine/witherspoon-tacoma.conf
@@ -7,6 +7,7 @@
 require conf/machine/include/p9.inc
 
 IMAGE_FSTYPES = "cpio.lzma"
+INITRAMFS_IMAGE = "obmc-phosphor-image"
 
 SERIAL_CONSOLES = "115200;ttyS4"