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.

(From meta-ibm rev: 3828b0070fd01e948fea02545da2bd91f96add36)

Change-Id: I723320ed88cf2fb7cbc063e4f41637fc98a5787e
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/meta-witherspoon/recipes-phosphor/ipmi/openpower-ipmi-oem_%.bbappend b/meta-ibm/meta-witherspoon/recipes-phosphor/ipmi/openpower-ipmi-oem_%.bbappend
new file mode 100644
index 0000000..588f23e
--- /dev/null
+++ b/meta-ibm/meta-witherspoon/recipes-phosphor/ipmi/openpower-ipmi-oem_%.bbappend
@@ -0,0 +1,5 @@
+DEPENDS_append = " acx22-yaml-config"
+
+EXTRA_OECONF = " \
+    INVSENSOR_YAML_GEN=${STAGING_DIR_HOST}${datadir}/acx22-yaml-config/ipmi-inventory-sensors.yaml \
+    "