drm/xe/display: Fix double mutex initialization

All of these mutexes are already initialized by the display side since
commit 3fef3e6f ("drm/i915: move display mutex inits to display
code"), so the xe shouldn´t initialize them.

Fixes: 44e69495 ("drm/xe/display: Implement display support")
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405200711.2041428-1-lucas.demarchi@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 117de185)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/display/xe_display.c

@@ -108,11 +108,6 @@ int xe_display_create(struct xe_device *xe)
 	xe->display.hotplug.dp_wq = alloc_ordered_workqueue("xe-dp", 0);
 
 	drmm_mutex_init(&xe->drm, &xe->sb_lock);
-	drmm_mutex_init(&xe->drm, &xe->display.backlight.lock);
-	drmm_mutex_init(&xe->drm, &xe->display.audio.mutex);
-	drmm_mutex_init(&xe->drm, &xe->display.wm.wm_mutex);
-	drmm_mutex_init(&xe->drm, &xe->display.pps.mutex);
-	drmm_mutex_init(&xe->drm, &xe->display.hdcp.hdcp_mutex);
 	xe->enabled_irq_mask = ~0;
 
 	err = drmm_add_action_or_reset(&xe->drm, display_destroy, NULL);