drm/i915: Avoid open-coded use of ratelimit_state structure's ->missed field

drm/i915: Avoid open-coded use of ratelimit_state structure's ->missed field

The i915_oa_stream_destroy() function directly accesses the
ratelimit_state structure's ->missed field, which works, but which also
makes it more difficult to change this field.  Therefore, make use of
the ratelimit_state_get_miss() function instead of directly accessing
the ->missed field.

Link: https://lore.kernel.org/all/fbe93a52-365e-47fe-93a4-44a44547d601@paulmck-laptop/
Link: https://lore.kernel.org/all/20250423115409.3425-1-spasswolf@web.de/
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tursulin@ursulin.net>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: <intel-gfx@lists.freedesktop.org>
Cc: <dri-devel@lists.freedesktop.org>