drm/i915: Add debug print about hw config table size

Add debug info to help investigate a very rare bug:
  https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13385



Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Julia Filipchuk <julia.filipchuk@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241221011925.3944625-1-John.C.Harrison@Intel.com