Fix stupid thinko on the path freeing the interrupts, where only
the first interrupt would get reset, and none of the others.

This should only affect multi-MSI allocations.
Reported-by: NWuyun Wu (Abel) <wuyun.wu@huawei.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Robert Richter <robert.richter@caviumnetworks.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>