UPSTREAM: drm/i915: Include the scanline offset in the state dump

When looking at raw hardware scanline numbers it's helpful to
remember what the offset between the hardware values and our
more human readable numbers should be. Include that in the state dump.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241210211007.5976-9-ville.syrjala@linux.intel.com


Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
(cherry picked from commit ab684293)

Bug: 432032023
Test: None
Change-Id: I7104b033dcf26deac5722b29968f4aa065cc61cc
Signed-off-by: Ap, Kamal <kamal.ap@intel.corp-partner.google.com>