drm/i915: Introduce i915_error_regs

Introduce i915_error_regs as the EIR/EMR counterpart
to the IIR/IMR/IER i915_irq_regs, and update the irq
reset/postingstall to utilize them accordingly.

v2: Include xe compat versions

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250217070047.953-7-ville.syrjala@linux.intel.com


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