ARM: orion: move custom gpio functions to orion-gpio.h

Move custom orion platforms gpio code to orion-gpio to remove the
dependency on mach/gpio.h.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>

arch/arm/plat-orion/irq.c

@@ -16,7 +16,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <plat/irq.h>
-#include <plat/gpio.h>
+#include <plat/orion-gpio.h>
 
 void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
 {