gpio: clps711x: delete local <mach/gpio.h> header

This header file is unused and we shall not add new headers
to the <mach/*> namespace. The macro may be reintroduced when
there is a user for it.

Cc: Alexander Shiyan <shc_work@mail.ru>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-clps711x/include/mach/gpio.h

-/*
- *  This file contains the CLPS711X GPIO definitions.
- *
- *  Copyright (C) 2012 Alexander Shiyan <shc_work@mail.ru>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* Simple helper for convert port & pin to GPIO number */
-#define CLPS711X_GPIO(port, bit)	((port) * 8 + (bit))