UPSTREAM: drm/i915: Include the vblank delay in the state dump

While one can look at the crtc timings to determine the actual
vblank dealy, it seems nicer to provide a more human readable
dump of it to ease our lives.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241210211007.5976-7-ville.syrjala@linux.intel.com


Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
(cherry picked from commit af14b81e)

Bug: 432032023
Test: None
Change-Id: I665c9b6cdd8e2be51287fabe4c2289dd5a4c03b9
Signed-off-by: Ap, Kamal <kamal.ap@intel.corp-partner.google.com>