[ARM] 4961/1: gpiolib support for SA-1100 architecture

This adds gpiolib support for the SA-1100 arch:
 - Move all GPIO API functions from generic.c into gpio.c
 - Convert all gpio functions into gpiolib callbacks.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c
index 3dc17d7..fa0403a 100644
--- a/arch/arm/mach-sa1100/irq.c
+++ b/arch/arm/mach-sa1100/irq.c
@@ -347,4 +347,6 @@
 	 */
 	set_irq_chip(IRQ_GPIO11_27, &sa1100_normal_chip);
 	set_irq_chained_handler(IRQ_GPIO11_27, sa1100_high_gpio_handler);
+
+	sa1100_init_gpio();
 }