Power supply monitor recipe, service, and conf

Add the Witherspoon power supply monitor application, service file, and
configuration files to the witherspoon-pfault-analysis recipe.

Moved OBMC_POWER_SUPPLY_INSTANCES to the global metadata so it can be
shared between recipes.

Resolves: openbmc/openbmc#1731

Depends-On: Ie364a3dc5b7f19cbc587450fc54f231d1ec280f7

Change-Id: I340a1d48a979a97624843e59a5ab1b1ad04056bb
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/machine/witherspoon.conf b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/machine/witherspoon.conf
index 1d9e6f7..6e37167 100644
--- a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/machine/witherspoon.conf
+++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/machine/witherspoon.conf
@@ -5,6 +5,8 @@
 
 OBMC_MACHINE_FEATURES += "obmc-mrw obmc-ubi-fs openpower-ubi-fs"
 
+OBMC_POWER_SUPPLY_INSTANCES = "0 1"
+
 PREFERRED_PROVIDER_virtual/p9-vcs-workaround = 'vcs-pre-post'
 
 require conf/machine/include/ast2500.inc