Move helpers.h to helper.h

Provides a file naming scheme consistent with other targets.
Signed-off-by: NLluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: NAlexander Graf <agraf@suse.de>

target-s390x/op_helper.c

@@ -21,7 +21,7 @@
 #include "cpu.h"
 #include "dyngen-exec.h"
 #include "host-utils.h"
-#include "helpers.h"
+#include "helper.h"
 #include <string.h>
 #include "kvm.h"
 #include "qemu-timer.h"

target-s390x/translate.c

@@ -38,9 +38,9 @@
 static TCGv_ptr cpu_env;
 
 #include "gen-icount.h"
-#include "helpers.h"
+#include "helper.h"
 #define GEN_HELPER 1
-#include "helpers.h"
+#include "helper.h"
 
 typedef struct DisasContext DisasContext;
 struct DisasContext {