meta-ibm: acx22: new YAML dependency scheme

A prior patch added a new recipe acx22-yaml-config to provide all the
YAML configuration for ACx22 systems.  This patch switches the layer to
that recipe by setting EXTRA_OECONF and DEPENDS as appropriate in the
required bbappends.

With this switch, a number of recipes and their provided YAML are now
dead metadata, so remove those.

Change-Id: I7b0190986615bc2a66334f125d97a54466a37eb9
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-witherspoon/recipes-phosphor/ipmi/phosphor-ipmi-fru_%.bbappend b/meta-witherspoon/recipes-phosphor/ipmi/phosphor-ipmi-fru_%.bbappend
new file mode 100644
index 0000000..408364c
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/ipmi/phosphor-ipmi-fru_%.bbappend
@@ -0,0 +1,6 @@
+DEPENDS_append = " acx22-yaml-config"
+
+EXTRA_OECONF = " \
+    YAML_GEN=${STAGING_DIR_HOST}${datadir}/acx22-yaml-config/ipmi-fru-read.yaml \
+    PROP_YAML=${STAGING_DIR_HOST}${datadir}/acx22-yaml-config/ipmi-extra-properties.yaml \
+    "