openpower/witherspoon: configure video-related packages into build

Add the fbterm, uart-render-controller and liberation font packages to
the witherspoon build.

Change-Id: Ifa20e9455f06f2ae4d7e9547f62e70ea102b4c89
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/meta-witherspoon/recipes-phosphor/images/obmc-phosphor-image.bbappend b/meta-witherspoon/recipes-phosphor/images/obmc-phosphor-image.bbappend
index 1214492..bea352f 100644
--- a/meta-witherspoon/recipes-phosphor/images/obmc-phosphor-image.bbappend
+++ b/meta-witherspoon/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -1 +1 @@
-OBMC_IMAGE_EXTRA_INSTALL_append = " mboxd max31785-msl phosphor-msl-verify"
+OBMC_IMAGE_EXTRA_INSTALL_append = " mboxd max31785-msl phosphor-msl-verify liberation-fonts uart-render-controller"