drm/xe/irq: Separate MSI and MSI-X flows

A new flow is added for devices that support MSI-X:
- MSI-X vector 0 is used for GuC-to-host interrupt
- MSI-X vector 1 (aka default MSI-X) is used for HW engines

The default MSI-X will be passed to the HW engines in a subsequent
patch.

Signed-off-by: Ilia Levi <ilia.levi@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241213072538.6823-2-ilia.levi@intel.com


Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>