ARM: uniphier: refactor LED function

The macro, led_write(), is now only used in C sources.  There is no
more reason to keep the tricky assembly macro.  Replace it with a
new C function led_puts().

Also, rename board.h to micro-support-card.h.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/include/mach/micro-support-card.h b/arch/arm/mach-uniphier/include/mach/micro-support-card.h
new file mode 100644
index 0000000..5da0ada
--- /dev/null
+++ b/arch/arm/mach-uniphier/include/mach/micro-support-card.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef ARCH_BOARD_H
+#define ARCH_BOARD_H
+
+#if defined(CONFIG_MICRO_SUPPORT_CARD)
+void support_card_reset(void);
+void support_card_init(void);
+void support_card_late_init(void);
+int check_support_card(void);
+void led_puts(const char *s);
+#else
+static inline void support_card_reset(void)
+{
+}
+
+static inline void support_card_init(void)
+{
+}
+
+static inline void support_card_late_init(void)
+{
+}
+
+static inline int check_support_card(void)
+{
+	return 0;
+}
+
+static inline void led_puts(const char *s)
+{
+}
+#endif
+
+#endif /* ARCH_BOARD_H */