hw/psi-p9: Make interrupt name array global
hw/psi-p9: Make interrupt name array global

The array of P9 PSI interrupt names is currently a static constant
inside psi_p9_irq_name(). We'd like to use these names in another
function so move it outside.

Signed-off-by: Oliver O'Halloran <3dfaff8fa6ae977f042064a112a6aac576279b9b@gmail.com>
Reviewed-by: Cédric Le Goater <2d8cace2254d4e43578d21933db015d84bcc468a@kaod.org>

legoater/skiboot,qemu/skiboot,legoater/skiboot,qemu/skiboot,shenki/skiboot,legoater/skiboot,shenki/skiboot,open-power/skiboot,open-power/skiboot,shenki/skiboot,qemu/skiboot,shenki/skiboot,open-power/skiboot,legoater/skiboot,shenki/skiboot,open-power/skiboot,legoater/skiboot,open-power/skiboot,qemu/skiboot,qemu/skiboot