drm/xe/oa: Fix "Missing outer runtime PM protection" warning

Fix the following drm_WARN:

[953.586396] xe 0000:00:02.0: [drm] Missing outer runtime PM protection
...
<4> [953.587090]  ? xe_pm_runtime_get_noresume+0x8d/0xa0 [xe]
<4> [953.587208]  guc_exec_queue_add_msg+0x28/0x130 [xe]
<4> [953.587319]  guc_exec_queue_fini+0x3a/0x40 [xe]
<4> [953.587425]  xe_exec_queue_destroy+0xb3/0xf0 [xe]
<4> [953.587515]  xe_oa_release+0x9c/0xc0 [xe]

Suggested-by: John Harrison <[email protected]>
Suggested-by: Matthew Brost <[email protected]>
Fixes: e936f88 ("drm/xe/oa/uapi: Expose OA stream fd")
Cc: [email protected]
Signed-off-by: Ashutosh Dixit <[email protected]>
Reviewed-by: Matthew Brost <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit b107c63)
Signed-off-by: Lucas De Marchi <[email protected]>

Author: ashutoshx

drivers/gpu/drm/xe/xe_oa.c

@@ -1206,9 +1206,11 @@ static int xe_oa_release(struct inode *inode, struct file *file)
 	struct xe_oa_stream *stream = file->private_data;
 	struct xe_gt *gt = stream->gt;
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	mutex_lock(&gt->oa.gt_lock);
 	xe_oa_destroy_locked(stream);
 	mutex_unlock(&gt->oa.gt_lock);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
 	/* Release the reference the OA stream kept on the driver */
 	drm_dev_put(&gt_to_xe(gt)->drm);