arch/irq: Centralise no_irq_type

arch/irq: Centralise no_irq_type

Having no_irq_type defined per arch, but using common callbacks is a mess, and
is particualrly hard to bootstrap a new architecture with.

Now that the ack()/end() hooks have been exported suitably, move the
definition of no_irq_type into common/irq.c, and make it const too for good
measure.

No functional change, but a whole lot less tangled.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>