s390: use __section macro everywhere

Small cleanup patch to use the shorter __section macro everywhere.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 9b4bb9d..00e38f0 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -289,7 +289,7 @@
 }
 early_param("vmalloc", parse_vmalloc);
 
-void *restart_stack __attribute__((__section__(".data")));
+void *restart_stack __section(.data);
 
 static void __init setup_lowcore(void)
 {