[S390] replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 9e9f6c1..45a7cd9 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -539,7 +539,7 @@
 
 /* logging routine for zfcp */
 #define _ZFCP_LOG(fmt, args...) \
-	printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \
+	printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __func__, \
 	       __LINE__ , ##args)
 
 #define ZFCP_LOG(level, fmt, args...) \