[ARM] pxa: merge assignment of set_wake into pxa_init_{irq,gpio}()

To further clean up the GPIO and IRQ structure:

1. pxa_init_irq_gpio() and pxa_init_gpio() combines into a single
   function pxa_init_gpio()

2. assignment of set_wake merged into pxa_init_{irq,gpio}() as
   an argument

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/generic.h b/arch/arm/mach-pxa/generic.h
index 0e3e058..bd2a235 100644
--- a/arch/arm/mach-pxa/generic.h
+++ b/arch/arm/mach-pxa/generic.h
@@ -9,14 +9,13 @@
  * published by the Free Software Foundation.
  */
 
+typedef int (*set_wake_t)(unsigned int, unsigned int);
+
 struct sys_timer;
 
 extern struct sys_timer pxa_timer;
-extern void __init pxa_init_irq(int irq_nr);
-extern void __init pxa_init_irq_gpio(int gpio_nr);
-extern void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int));
-extern void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int));
-extern void __init pxa_init_gpio(int gpio_nr);
+extern void __init pxa_init_irq(int irq_nr, set_wake_t fn);
+extern void __init pxa_init_gpio(int gpio_nr, set_wake_t fn);
 extern void __init pxa25x_init_irq(void);
 extern void __init pxa27x_init_irq(void);
 extern void __init pxa3xx_init_irq(void);