ARM: uniphier: remove unused header mio-regs.h

This header is no longer used.

This is the last file in arch/arm/mach-uniphier/include/mach/.
At last, I've succeeded in eliminating the mach directory.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/include/mach/mio-regs.h

@@ -1,20 +0,0 @@
-/*
- * UniPhier MIO (Media I/O) registers
- *
- * Copyright (C) 2014 Panasonic Corporation
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#ifndef ARCH_MIO_REGS_H
-#define ARCH_MIO_REGS_H
-
-#define MIO_BASE		0x59810000
-
-#define MIO_CLKCTRL(i)		(MIO_BASE + 0x200 * (i) + 0x0020)
-#define MIO_RSTCTRL(i)		(MIO_BASE + 0x200 * (i) + 0x0110)
-#define MIO_USB_RSTCTRL(i)	(MIO_BASE + 0x200 * (i) + 0x0114)
-
-#define MIO_USB_RSTCTRL_XRST	(0x1 << 0)
-
-#endif /* ARCH_MIO_REGS_H */