ARM: shmobile: kzm9g-reference: Remove unneeded nr_irqs initialization

As per arch_probe_nr_irqs(), the default value is NR_IRQS, which maps to
NR_IRQS_LEGACY if CONFIG_SPARSE_IRQ=y.

Since SPARSE_IRQ is selected by both ARCH_MULTIPLATFORM and
ARCH_SHMOBILE_LEGACY, it's always enabled on shmobile.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/board-kzm9g-reference.c

@@ -52,7 +52,6 @@ DT_MACHINE_START(KZM9G_DT, "kzm9g-reference")
 	.smp		= smp_ops(sh73a0_smp_ops),
 	.map_io		= sh73a0_map_io,
 	.init_early	= sh73a0_init_delay,
-	.nr_irqs	= NR_IRQS_LEGACY,
 	.init_machine	= kzm_init,
 	.init_late	= shmobile_init_late,
 	.dt_compat	= kzm9g_boards_compat_dt,