gic_set_cpu will directly use irq_desc[]. If CONFIG_SPARSE_IRQ is
enabled, there is no irq_desc[]. So we need use irq_to_desc(irq) to
get the descriptor for irq.
Signed-off-by: NChao Xie <chao.xie@marvell.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>