meta-evb-ast2600: Add obmc-phosphor-bsp-common.inc

Add obmc-phosphor-bsp-common.inc for building OpenBMC image.

Tested build with:
	TEMPLATECONF=meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf . openbmc-env
	bitbake obmc-phosphor-image

Signed-off-by: Troy Lee <troy_lee@aspeedtech.com>
Change-Id: I1e483c243dcaca56cbd69b7dcf170b8f518b954d
diff --git a/meta-evb-aspeed/meta-evb-ast2600/conf/local.conf.sample b/meta-evb-aspeed/meta-evb-ast2600/conf/local.conf.sample
index ab109b0..4ede461 100644
--- a/meta-evb-aspeed/meta-evb-ast2600/conf/local.conf.sample
+++ b/meta-evb-aspeed/meta-evb-ast2600/conf/local.conf.sample
@@ -19,3 +19,5 @@
 EXTRA_USERS_PARAMS = " \
   usermod -p '\$1\$UGMqyqdG\$FZiylVFmRRfl9Z0Ue8G7e/' root; \
   "
+
+require conf/machine/include/obmc-bsp-common.inc