pinctrl: sh-pfc: Add missing #include <linux/errno.h>

Source files using -Exxx error codes should include <linux/errno.h>.
On ARM, this header file is included indirectly; on SuperH, it is not,
leading to "error: ‘EINVAL’ undeclared" failures when enabling
compile-testing later.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>

drivers/pinctrl/sh-pfc/pfc-r8a77470.c

@@ -5,6 +5,7 @@
  * Copyright (C) 2018 Renesas Electronics Corp.
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
 #include "sh_pfc.h"

drivers/pinctrl/sh-pfc/pfc-r8a7790.c

@@ -8,6 +8,7 @@
  * Copyright (C) 2012  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
  */
 
+#include <linux/errno.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/sys_soc.h>

drivers/pinctrl/sh-pfc/pfc-r8a7791.c

@@ -6,6 +6,7 @@
  * Copyright (C) 2014-2017 Cogent Embedded, Inc.
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
 #include "sh_pfc.h"

drivers/pinctrl/sh-pfc/pfc-r8a7794.c

@@ -7,6 +7,7 @@
  * Copyright (C) 2015-2017 Cogent Embedded, Inc. <source@cogentembedded.com>
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/sys_soc.h>
 

drivers/pinctrl/sh-pfc/pfc-r8a7795-es1.c

@@ -5,6 +5,7 @@
  * Copyright (C) 2015-2017  Renesas Electronics Corporation
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
 #include "core.h"

drivers/pinctrl/sh-pfc/pfc-r8a7795.c

@@ -5,6 +5,7 @@
  * Copyright (C) 2015-2017 Renesas Electronics Corporation
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/sys_soc.h>
 

drivers/pinctrl/sh-pfc/pfc-r8a7796.c

@@ -11,6 +11,7 @@
  * Copyright (C) 2015  Renesas Electronics Corporation
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
 #include "core.h"

drivers/pinctrl/sh-pfc/pfc-r8a77965.c

@@ -12,6 +12,7 @@
  * Copyright (C) 2015  Renesas Electronics Corporation
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
 #include "core.h"

drivers/pinctrl/sh-pfc/pfc-r8a77970.c

@@ -12,6 +12,7 @@
  * Copyright (C) 2015  Renesas Electronics Corporation
  */
 
+#include <linux/errno.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 

drivers/pinctrl/sh-pfc/pfc-r8a77980.c

@@ -12,6 +12,7 @@
  * Copyright (C) 2015 Renesas Electronics Corporation
  */
 
+#include <linux/errno.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 

drivers/pinctrl/sh-pfc/pfc-r8a77990.c

@@ -11,6 +11,7 @@
  * Copyright (C) 2016-2017 Renesas Electronics Corp.
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
 #include "core.h"

drivers/pinctrl/sh-pfc/pfc-r8a77995.c

@@ -11,6 +11,7 @@
  * Copyright (C) 2015  Renesas Electronics Corporation
  */
 
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
 #include "core.h"