at91: factorize at91 interrupts init to soc

they are the same except the default priority

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
diff --git a/arch/arm/mach-at91/soc.h b/arch/arm/mach-at91/soc.h
index 6d7a18f..99afa7c 100644
--- a/arch/arm/mach-at91/soc.h
+++ b/arch/arm/mach-at91/soc.h
@@ -5,6 +5,7 @@
  */
 
 struct at91_soc {
+	unsigned int *default_irq_priority;
 	void (*map_io)(void);
 	void (*init)(unsigned long main_clock);
 };