drm/i915/display: Allow async flip when Selective Fetch is enabled

drm/i915/display: Allow async flip when Selective Fetch is enabled

Fix silent conflict during drm-next backmerge causing async flips being
rejected when Selective Fetch is enabled.

Fixes: b8304863a399 ("Merge drm/drm-next into drm-intel-next")
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patch.msgid.link/20251216130351.2799110-1-jouni.hogander@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>