ARM: uniphier: use (devm_)ioremap() instead of map_sysmem()

This does not have much impact on behavior, but makes code look more
more like Linux.  The use of devm_ioremap() often helps to delete
.remove callbacks entirely.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
index 9223eeb..b534274 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ * Copyright (C) 2015-2016 Socionext Inc.
+ *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -147,7 +148,6 @@
 	.id = UCLASS_PINCTRL,
 	.of_match = of_match_ptr(uniphier_pxs2_pinctrl_match),
 	.probe = uniphier_pxs2_pinctrl_probe,
-	.remove = uniphier_pinctrl_remove,
 	.priv_auto_alloc_size = sizeof(struct uniphier_pinctrl_priv),
 	.ops = &uniphier_pinctrl_ops,
 };