[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/irq.c b/arch/arm/mach-pxa/irq.c
index cccc3ed..fbff557 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -51,7 +51,7 @@
 	.unmask		= pxa_unmask_irq,
 };
 
-void __init pxa_init_irq(int irq_nr)
+void __init pxa_init_irq(int irq_nr, set_wake_t fn)
 {
 	int irq;
 
@@ -70,12 +70,8 @@
 		set_irq_handler(irq, handle_level_irq);
 		set_irq_flags(irq, IRQF_VALID);
 	}
-}
 
-void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int))
-{
-	pxa_internal_irq_chip.set_wake = set_wake;
-	pxa_init_gpio_set_wake(set_wake);
+	pxa_internal_irq_chip.set_wake = fn;
 }
 
 #ifdef CONFIG_PM