Fix 8122 gnss build

Change-Id: Ib7722db175c8916931d130a5390890c1da958017
diff --git a/config b/config
index a3df9cc..3d81448 100755
--- a/config
+++ b/config
@@ -10,8 +10,8 @@
 #set all apn cid support?
 CONFIG_MBTK_ALL_CID_SUPPORT=n
 
-# MBTK gnss mode (gnss_5311 / gnss_6228)
-CONFIG_MBTK_GNSS_MODE=gnss_5311
+# MBTK gnss mode (gnss_5311 / gnss_6228 / gnss_8122)
+CONFIG_MBTK_GNSS_MODE=gnss_8122
 
 # MBTK dump support?
 CONFIG_MBTK_DUMP_SUPPORT=n