Since we already have a special case in map to set the ipi handler, use
the desired flow.
If we don't find an ics to handle the interrupt complain instead of
returning 0 without having set a chip or handler.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
e085255ebc