Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/gnss.h b/include/linux/gnss.h
index 4354697..36968a0 100644
--- a/include/linux/gnss.h
+++ b/include/linux/gnss.h
@@ -22,6 +22,7 @@
 	GNSS_TYPE_NMEA = 0,
 	GNSS_TYPE_SIRF,
 	GNSS_TYPE_UBX,
+	GNSS_TYPE_MTK,
 
 	GNSS_TYPE_COUNT
 };