MRW: Use a distro override to enable providers

Now that obmc-mrw is no longer a machine feature we can organize
a bit and enable MRW providers off to the side with a disto override,
de-cluttering wherever non-MRW defaults are specified.

No functional impact but slightly easier for humans to parse.

Change-Id: If2731206b94e16e0b0132a385756eb11178118f2
Tested: Built a Witherspoon image and validated manifest
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc b/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc
index b84be87..a67b7f5 100644
--- a/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc
+++ b/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc
@@ -23,15 +23,12 @@
 PREFERRED_PROVIDER_virtual/obmc-inventory-data ?= "${VIRTUAL-RUNTIME_skeleton_workbook}"
 PREFERRED_PROVIDER_virtual/phosphor-ipmi-fru-hostfw-config ?= "hostboot-inventory-config-native"
 PREFERRED_PROVIDER_virtual/openpower-fru-vpd-layout ?= "openpower-fru-vpd-layout-native"
-PREFERRED_PROVIDER_virtual/openpower-fru-inventory ?= \
-    "${@df_enabled(d, 'obmc-mrw', 'openpower-fru-inventory-mrw-native', 'openpower-fru-inventory-example-native')}"
-PREFERRED_PROVIDER_virtual/openpower-fru-properties ?= \
-    "${@df_enabled(d, 'obmc-mrw', 'openpower-fru-properties-mrw-native', 'openpower-fru-properties-example-native')}"
+PREFERRED_PROVIDER_virtual/openpower-fru-inventory ?= "openpower-fru-inventory-example-native"
+PREFERRED_PROVIDER_virtual/openpower-fru-properties ?= "openpower-fru-properties-example-native"
 
 # The openpower-occ-control application is data-driven and requires an input
 # yaml of OCC instance numbers to sensor IDs.
 # This virtual is a native recipe that provides that mapping by installing
 # configuration files in the format and native sysroot location expected by
 # the openpower-occ-control build process in the native sysroot.
-PREFERRED_PROVIDER_virtual/openpower-occ-control-config-native ?= \
-    "${@df_enabled(d, 'obmc-mrw', 'openpower-occ-control-config-mrw-native', 'openpower-occ-control-config-example-native')}"
+PREFERRED_PROVIDER_virtual/openpower-occ-control-config-native ?= "openpower-occ-control-config-example-native"