[ARM] 4553/1: ARM at91: define FIQ_START

For ARM at91, the FIQ_START #define is required if you use a driver
that enables FIQ support.
Signed-off-by: NKarl Olsen <karl@micro-technic.com>
Acked-by: Andrew Victor <andrew at sanpeople.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-at91/irqs.h

@@ -42,4 +42,7 @@
  */
 #define	NR_IRQS		(NR_AIC_IRQS + (5 * 32))
 
+/* FIQ is AIC source 0. */
+#define FIQ_START AT91_ID_FIQ
+
 #endif