meta-facebook: greatlakes: add post code byte definition in greatlakes.conf

Description:
- Add post code byte definition in greatlakes.conf.

Design:
- Originally, there is a default value(1) to define how many
  bytes post code that CPU sends each time in phosphor-host-postd
- Define a parameter in conf file to tell BMC the exact post
  code size in this platform
- Moreover, if other Repo. needs this information, it could
  direclty use in bbappend

Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@wiwynn.com>
Change-Id: Ia525e69ed0c02106a0e6ebbc8269068f55b5b51b
diff --git a/meta-facebook/meta-greatlakes/conf/machine/greatlakes.conf b/meta-facebook/meta-greatlakes/conf/machine/greatlakes.conf
index ea04858..b36b7b3 100644
--- a/meta-facebook/meta-greatlakes/conf/machine/greatlakes.conf
+++ b/meta-facebook/meta-greatlakes/conf/machine/greatlakes.conf
@@ -22,3 +22,4 @@
 
 VIRTUAL-RUNTIME_obmc-host-state-manager = "phosphor-state-manager-host"
 VIRTUAL-RUNTIME_obmc-chassis-state-manager = "phosphor-state-manager-chassis"
+POST_CODE_BYTES = "1"