FROMGIT: drm/dp_mst: Factor out function to queue a topology probe work

Factor out a function to queue a work for probing the topology, also
used by the next patch.

Cc: Lyude Paul <lyude@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240722165503.2084999-2-imre.deak@intel.com
(cherry picked from commit e9b36c5b
 https://gitlab.freedesktop.org/drm/i915/kernel.git

 drm-intel-next)

BUG=b:332903004, b:322223603
TEST=Verify the link training fallback for UHBR<->non-UHBR rates

Change-Id: Ib77f15dead64873175448e11ff0c942c9bf1550b
Signed-off-by: Rakshith M O <rakshith.m.o@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5802900


Reviewed-by: Sean Paul <sean@poorly.run>
Reviewed-by: Khaled Almahallawy <khaled.almahallawy@intel.com>
Reviewed-by: Manasi Navare <navaremanasi@chromium.org>
Signed-off-by: Hubert Mazur <hmazur@google.com>