ARM: at91: fix external interrupts in non-DT case

Management of external interrupts has changed but the
non-DT code has not integrated these changes.
Add a mask to pass external irq specification from SoC
specific code to the at91_aic_init() function.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: stable <stable@vger.kernel.org> [v3.6]
diff --git a/arch/arm/mach-at91/irq.c b/arch/arm/mach-at91/irq.c
index 1e02c0e..febc2ee 100644
--- a/arch/arm/mach-at91/irq.c
+++ b/arch/arm/mach-at91/irq.c
@@ -502,14 +502,19 @@
 /*
  * Initialize the AIC interrupt controller.
  */
-void __init at91_aic_init(unsigned int *priority)
+void __init at91_aic_init(unsigned int *priority, unsigned int ext_irq_mask)
 {
 	unsigned int i;
 	int irq_base;
 
-	if (at91_aic_pm_init())
+	at91_extern_irq = kzalloc(BITS_TO_LONGS(n_irqs)
+				  * sizeof(*at91_extern_irq), GFP_KERNEL);
+
+	if (at91_aic_pm_init() || at91_extern_irq == NULL)
 		panic("Unable to allocate bit maps\n");
 
+	*at91_extern_irq = ext_irq_mask;
+
 	at91_aic_base = ioremap(AT91_AIC, 512);
 	if (!at91_aic_base)
 		panic("Unable to ioremap AIC registers\n");