ibm: Create p10bmc build target

Replace rainier with p10bmc as build target. Keep the rainier.conf as a
symlink to p10bmc.conf to allow the transition. Remove the rainier.conf
and the machine override from p10bmc.conf in a later commit to complete
the replacement.

Tested: Built rainier and p10bmc and checked for some files/service
        units to exist on both.

Change-Id: Ic8c8c6ffbc3507fbd9c692da259e37ae695359a6
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-ibm/conf/machine/rainier.conf b/meta-ibm/conf/machine/p10bmc.conf
similarity index 94%
rename from meta-ibm/conf/machine/rainier.conf
rename to meta-ibm/conf/machine/p10bmc.conf
index f7f08dd..22b59b4 100644
--- a/meta-ibm/conf/machine/rainier.conf
+++ b/meta-ibm/conf/machine/p10bmc.conf
@@ -5,6 +5,7 @@
 
 OBMC_POWER_SUPPLY_INSTANCES = "0 1 2 3"
 
+# TODO remove the MACHINEOVERRIDES when the rainier.conf file is removed.
 MACHINEOVERRIDES =. "p10bmc:"
 require conf/machine/include/ast2600.inc
 require conf/machine/include/obmc-bsp-common.inc
diff --git a/meta-ibm/conf/machine/rainier.conf b/meta-ibm/conf/machine/rainier.conf
new file mode 120000
index 0000000..ddfb6ec
--- /dev/null
+++ b/meta-ibm/conf/machine/rainier.conf
@@ -0,0 +1 @@
+p10bmc.conf
\ No newline at end of file