meta-quanta: gbs: add gbmc distro override

1. add gbmc distro override
2. add GBMC_NCSI_IF_NAME to enable gbmc-ncsi-config
3. enable kernel netfilter configurations to be compatible
   with gbmc network config rules

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I5b36f79d4a6dcb31753deb860d2e0c7f3349efbd
diff --git a/meta-quanta/meta-gbs/conf/machine/gbs.conf b/meta-quanta/meta-gbs/conf/machine/gbs.conf
index d5a6e78..2419052 100644
--- a/meta-quanta/meta-gbs/conf/machine/gbs.conf
+++ b/meta-quanta/meta-gbs/conf/machine/gbs.conf
@@ -10,6 +10,8 @@
 require conf/machine/include/npcm7xx.inc
 require conf/machine/include/obmc-bsp-common.inc
 
+GBMC_NCSI_IF_NAME = "eth0"
+
 # Overwrite flash offsets
 FLASH_ROFS_OFFSET = "7296"
 FLASH_RWFS_OFFSET = "61440"