Add Preferred provider for obmc-host-ctl

Added preferred provider for obmc-host-ctl in Tiogapass configuration.
Currently we don't have our own host-ctl and I was getting build error
where obmc-host-ctl had multiple provider and I just choose this one
to get pass build. We will update this once we figure out right
obmc-host-ctl for us.

Tested: Build Facebook TiogaPass board and load on the
target hardware. Ensure that BMC boots to console.

(From meta-facebook rev: a8d90c530373396a1d26b59ea8598dad909683e6)

Change-Id: Ibd4ebfe0ec27e52b5196b891f97ac529c0ff8427
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-facebook/meta-tiogapass/conf/machine/tiogapass.conf b/meta-facebook/meta-tiogapass/conf/machine/tiogapass.conf
index d47dc49..cc4e3be 100644
--- a/meta-facebook/meta-tiogapass/conf/machine/tiogapass.conf
+++ b/meta-facebook/meta-tiogapass/conf/machine/tiogapass.conf
@@ -16,6 +16,7 @@
         obmc-chassis-state-mgmt \
         obmc-bmc-state-mgmt \
         "
+PREFERRED_PROVIDER_virtual/obmc-host-ctl ?= "obmc-op-control-host"
 FLASH_SIZE = "32768"
 VIRTUAL-RUNTIME_skeleton_workbook = "${MACHINE}-config"