[ARM] 3946/1: AT91: at91_arch_reset and at91_extern_irq

The external interrupt sources are different on the various AT91
processors.  This patch introduces the global 'at91_extern_irq' variable
that contains a bitset of the available external interrupt sources.

The processor reset mechanism also differs on the various AT91
processors.  This patch also adds a global 'at91_arch_reset' callback
(from system.h) into the processor-specific code to perform the reset.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-at91rm9200/pm.c b/arch/arm/mach-at91rm9200/pm.c
index 32c95d8..5e3b6e3 100644
--- a/arch/arm/mach-at91rm9200/pm.c
+++ b/arch/arm/mach-at91rm9200/pm.c
@@ -112,7 +112,6 @@
 static void (*slow_clock)(void);
 
 
-
 static int at91_pm_enter(suspend_state_t state)
 {
 	at91_gpio_suspend();
@@ -123,13 +122,7 @@
 			(at91_sys_read(AT91_PMC_PCSR)
 					| (1 << AT91_ID_FIQ)
 					| (1 << AT91_ID_SYS)
-					| (1 << AT91RM9200_ID_IRQ0)
-					| (1 << AT91RM9200_ID_IRQ1)
-					| (1 << AT91RM9200_ID_IRQ2)
-					| (1 << AT91RM9200_ID_IRQ3)
-					| (1 << AT91RM9200_ID_IRQ4)
-					| (1 << AT91RM9200_ID_IRQ5)
-					| (1 << AT91RM9200_ID_IRQ6))
+					| (at91_extern_irq))
 				& at91_sys_read(AT91_AIC_IMR),
 			state);