Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 78aba8d..e57d68e 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -164,6 +164,7 @@
 int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd);
 int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
 	      u64 summary_indicator_addr, u64 subchannel_indicator_addr);
+int chsc_sgib(u32 origin);
 int chsc_error_from_response(int response);
 
 int chsc_siosl(struct subchannel_id schid);