UPSTREAM: drm/i915/psr: Add function for triggering "Frame Change" event

Add new function to trigger "Frame Change" event for ensuring we are waking
up before vblank evasion.

v2: dsb as a first parameter

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250213064804.2077127-12-jouni.hogander@intel.com


(cherry picked from commit fa27fa48)

Bug: 432032023
Test: None
Change-Id: I7b88376a1b365b1099ce234d403bba26ed52ab6a
Signed-off-by: Ap, Kamal <kamal.ap@intel.corp-partner.google.com>