dp: clear memory domain when freeing

Recently a new function has been added to Zephyr to safely remove
memory domains. Use it when releasing domains in SOF DP.

Signed-off-by: Guennadi Liakhovetski <[email protected]>

Author: lyakh

src/schedule/zephyr_dp_schedule_application.c

@@ -387,6 +387,7 @@ static void scheduler_dp_domain_free(struct task_dp_pdata *pdata)
 
 	/* All partitions removed, the domain can be freed now */
 	pmod->mdom = NULL;
+	k_mem_domain_deinit(mdom);
 	objpool_free(&dp_mdom_head, mdom);
 }