xen/arm: gic: split set_irq_properties

xen/arm: gic: split set_irq_properties

The callback set_irq_properties will configure the GIC for a specific
IRQ with the type and the priority.

In a follow-up patch, Xen will configure the type and the priority at
different stage of the routing. So split it in 2 separate callbacks.

At the same time, move the ASSERT to check the validity of the type and
if the desc->lock is locked in the common code (gic.c). This is because
the constraint are the same between GICv2 and GICv3, however the driver
of the latter did not contain any sanity check.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>