meta-ibm: palmetto: override variable assignments

Add overrides to variable assignments as described in "Modify Variables
to Support a Different Machine" in the yocto development tasks manual:
https://www.yoctoproject.org/docs/latest/dev-manual/dev-manual.html#best-practices-to-follow-when-creating-layers

In a nutshell this allows multiple BSP layers to be included
simultaneously in bblayers.conf, which increases the potential for meta
data sharing between layers.

(From meta-ibm rev: a7ed71c672baa533eddcc8cc713b03d2ee07c4e4)

Change-Id: Id057b3520db5952310b31f188e53263653606d54
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/host/checkstop-monitor.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/host/checkstop-monitor.bbappend
index 72d991c..2d33559 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/host/checkstop-monitor.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/host/checkstop-monitor.bbappend
@@ -1 +1 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS_prepend_palmetto := "${THISDIR}/${PN}:"
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/images/obmc-phosphor-image.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/images/obmc-phosphor-image.bbappend
index aa57bbf..7553460 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/images/obmc-phosphor-image.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -1 +1 @@
-OBMC_IMAGE_EXTRA_INSTALL_append = " mboxd"
+OBMC_IMAGE_EXTRA_INSTALL_append_palmetto = " mboxd"
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-fru-properties-native.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-fru-properties-native.bbappend
index 72d991c..2d33559 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-fru-properties-native.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-fru-properties-native.bbappend
@@ -1 +1 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS_prepend_palmetto := "${THISDIR}/${PN}:"
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-native.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-native.bbappend
index 72d991c..2d33559 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-native.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-native.bbappend
@@ -1 +1 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS_prepend_palmetto := "${THISDIR}/${PN}:"
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/mrw/mrw-native_%.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/mrw/mrw-native_%.bbappend
index 836ef56..b5ea370 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/mrw/mrw-native_%.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/mrw/mrw-native_%.bbappend
@@ -1,2 +1,2 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
-SRC_URI += "file://palmetto.xml.patch.xml"
+FILESEXTRAPATHS_prepend_palmetto := "${THISDIR}/${PN}:"
+SRC_URI_append_palmetto = " file://palmetto.xml.patch.xml"
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
index e5b837a..c0748b9 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
@@ -1 +1 @@
-RDEPENDS_${PN}-inventory += "openpower-occ-control"
+RDEPENDS_${PN}-inventory_append_palmetto = " openpower-occ-control"
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
index c3650f4..bff8497 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
@@ -1,4 +1,4 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS_prepend_palmetto := "${THISDIR}/${PN}:"
 
 NAMES = " \
         bus@1e78a000/i2c-bus@40/rtc@68 \
@@ -10,4 +10,4 @@
 ITEMS = "${@compose_list(d, 'ITEMSFMT', 'NAMES')}"
 
 ENVS = "obmc/hwmon/{0}"
-SYSTEMD_ENVIRONMENT_FILE_${PN} += "${@compose_list(d, 'ENVS', 'ITEMS')}"
+SYSTEMD_ENVIRONMENT_FILE_${PN}_append_palmetto = " ${@compose_list(d, 'ENVS', 'ITEMS')}"
diff --git a/meta-ibm/meta-palmetto/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend b/meta-ibm/meta-palmetto/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend
index 72d991c..2d33559 100644
--- a/meta-ibm/meta-palmetto/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend
+++ b/meta-ibm/meta-palmetto/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend
@@ -1 +1 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS_prepend_palmetto := "${THISDIR}/${PN}:"