meta-openpower: Predicate packages on MACHINE_FEATURES

Change packages enabled by meta-openpower to be enabled if and only if
both its corresponding feature string (obmc-openpower,
obmc-openpower-extra, obmc-openpower-legacy) are present in both
MACHINE_FEATURES and DISTRO_FEATURES.

Fixes openbmc/openbmc#2652.

Change-Id: Ife1a9b08e94bd85a888d584a0caa4dbfa6a172c0
Signed-off-by: Xo Wang <xow@google.com>
diff --git a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/packagegroups/nativesdk-packagegroup-sdk-host.bbappend b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/packagegroups/nativesdk-packagegroup-sdk-host.bbappend
index 623e268..3bead56 100644
--- a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/packagegroups/nativesdk-packagegroup-sdk-host.bbappend
+++ b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/packagegroups/nativesdk-packagegroup-sdk-host.bbappend
@@ -1,4 +1,4 @@
-RDEPENDS_${PN}_append = " \
+RDEPENDS_${PN}_append = " ${@cf_enabled(d, 'obmc-openpower', '\
         nativesdk-openpower-dbus-interfaces-yaml \
         nativesdk-openpower-debug-collector-yaml \
-        "
+        ')}"