drm/xe: Defer irq init until after xe_display_init_noaccel

As stated in previous commit, we have to move interrupt handling
until after xe_display_init_noaccel, as using memirqs would require
an allocation.

A full solution will of course require memirq allocation to be moved,
but the first part only focuses on the required changes to display.

Reviewed-by: Ilia Levi <ilia.levi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250121142850.4960-2-dev@lankhorst.se


Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>