ARM: 7841/1: sa1100: remove complex GPIO interface

The SA1100 was implementing its own variants of gpio_get_value()
and gpio_set_value() and only selectively falling back to
gpiolib for extended (EGPIO) handling. However the driver in
gpio/gpio-sa1100.c already handles the same functionality for
these lines, yet remain unused.

The only upside would be things like a timing-critical hotpath
on bit-banged GPIO, but that kind of things does not seem to
happen on these GPIOs, so it is not worth having the extra
complexity.

Tested with some buttons on the Compaq iPAQ H3630.

Cc: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -692,7 +692,6 @@ config ARCH_SA1100
 	select GENERIC_CLOCKEVENTS
 	select HAVE_IDE
 	select ISA
-	select NEED_MACH_GPIO_H
 	select NEED_MACH_MEMORY_H
 	select SPARSE_IRQ
 	help

arch/arm/mach-sa1100/include/mach/h3xxx.h

@@ -13,6 +13,8 @@
 #ifndef _INCLUDE_H3XXX_H_
 #define _INCLUDE_H3XXX_H_
 
+#include "hardware.h" /* Gives GPIO_MAX */
+
 /* Physical memory regions corresponding to chip selects */
 #define H3600_EGPIO_PHYS	(SA1100_CS5_PHYS + 0x01000000)
 #define H3600_BANK_2_PHYS	SA1100_CS2_PHYS

drivers/gpio/gpio-sa1100.c

@@ -10,7 +10,7 @@
 #include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/module.h>
-
+#include <linux/io.h>
 #include <mach/hardware.h>
 #include <mach/irqs.h>