davinci: Make GPIO code more generic

The current gpio code needs to know the number of
gpio irqs there are and what the bank irq number is.
To determine those values, it checks the SoC type.

It also assumes that the base address and the number
of irqs the interrupt controller uses is fixed.

To clean up the SoC checks and make it support
different base addresses and interrupt controllers,
have the SoC-specific code set those values in
the soc_info structure and have the gpio code
reference them there.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/include/mach/common.h

@@ -58,6 +58,9 @@ struct davinci_soc_info {
 	unsigned long			intc_irq_num;
 	struct davinci_timer_info	*timer_info;
 	void __iomem			*wdt_base;
+	void __iomem			*gpio_base;
+	unsigned			gpio_num;
+	unsigned			gpio_irq;
 };
 
 extern struct davinci_soc_info davinci_soc_info;