ARM: omap1: Switch to use MULTI_IRQ

This allows us to get a bit further with SPARSE_IRQ and
MULTIARCH support.

Note that we now also rename omap_irq_flags to omap_l2_irq
as that's the omap_irq_flags naming is confusing. It just
contains the interrupt number for the l2 irq.

Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap1/board-nokia770.c

@@ -294,6 +294,7 @@ MACHINE_START(NOKIA770, "Nokia 770")
 	.map_io		= omap16xx_map_io,
 	.init_early     = omap1_init_early,
 	.init_irq	= omap1_init_irq,
+	.handle_irq	= omap1_handle_irq,
 	.init_machine	= omap_nokia770_init,
 	.init_late	= omap1_init_late,
 	.init_time	= omap1_timer_init,