ARM: PRIMA2: irq: make prima2 irq can work even we enable GIC for Marco

in Marco, we will use GIC. this patch prepares the handle_irq for prima2
to avoid the compiling errors since we want only one defconfig and zImage
for both prima2 and marco that means we will need handle_irq for both.

Signed-off-by: Baohua Song <Baohua.Song@csr.com>
diff --git a/arch/arm/mach-prima2/common.c b/arch/arm/mach-prima2/common.c
index 8e6f668..99f9c7e 100644
--- a/arch/arm/mach-prima2/common.c
+++ b/arch/arm/mach-prima2/common.c
@@ -41,6 +41,9 @@
 	.map_io         = sirfsoc_map_lluart,
 	.init_irq	= sirfsoc_of_irq_init,
 	.init_time	= sirfsoc_prima2_timer_init,
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+	.handle_irq     = sirfsoc_handle_irq,
+#endif
 	.dma_zone_size	= SZ_256M,
 	.init_machine	= sirfsoc_mach_init,
 	.init_late	= sirfsoc_init_late,