drm/xe: Fix freq kobject leak on sysfs_create_files failure

Ensure gt->freq is released when sysfs_create_files() fails
in xe_gt_freq_init(). Without this, the kobject would leak.
Add kobject_put() before returning the error.

Fixes: fdc81c43f0c1 ("drm/xe: use devm_add_action_or_reset() helper")
Signed-off-by: Shuicheng Lin <[e-mail]>
Reviewed-by: Alex Zuo <[e-mail]>
Reviewed-by: Xin Wang <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Matt Roper <[e-mail]>
(cherry picked from commit 251be5fb4982ebb0f5a81b62d975bd770f3ad5c2)
Signed-off-by: Thomas Hellström <[e-mail]>

drivers/gpu/drm/xe/xe_gt_freq.c

···
 		return -ENOMEM;
 
 	err = sysfs_create_files(gt->freq, freq_attrs);
-	if (err)
+	if (err) {
+		kobject_put(gt->freq);
 		return err;
+	}
 
 	err = devm_add_action_or_reset(xe->drm.dev, freq_fini, gt->freq);
 	if (err)