meta-facebook: yosemitev2: Add post code support for multi host in meta-facebook.

Added implementation to handle post codes from multiple host to BMC with
multi process approach. Each process handles post codes for corresponding host.

TESTED : Built the openbmc image targetting Facebook YosemiteV2 hardware.
Verified all the host's postcodes stored in corresponding host directories.

(From meta-facebook rev: 3247463e69d7645ec9805a2a50d65e1c525d08cb)

Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
Change-Id: Ib6c410a0cae9776c595d53387ab017c496bccb97
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf b/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf
index f2a6512..d246cc9 100644
--- a/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf
+++ b/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf
@@ -11,3 +11,4 @@
 
 PREFERRED_PROVIDER_virtual/obmc-host-ctl ?= ""
 FLASH_SIZE = "32768"
+OBMC_HOST_INSTANCES = "1 2 3 4"