schedule: user-space ll: grant access to DAIs and DMAs

If the low-latency domain tasks are run in user-space, grant the LL
threads access to all DAI and DMA devices.

In future, there may be need to filter access permissions more, and/or
have variation between different build targets, but for now the user LL
thread will have access to the same devices as it does in kernel space.

Note that access to memory is separately controlled and in addition
to having access to a DMA device, user-space thread also needs access
to the memory before it can do DMA transactions.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

Author: kv2019i

src/schedule/zephyr_domain.c

@@ -336,6 +336,8 @@ static int zephyr_domain_register_user(struct ll_schedule_domain *domain,
 
 		k_mem_domain_add_thread(zephyr_ll_mem_domain(), thread);
 		k_thread_access_grant(thread, dt->sem, domain->lock, zephyr_domain->timer);
+		user_grant_dai_access_all(thread);
+		user_grant_dma_access_all(thread);
 		tr_dbg(&ll_tr, "granted LL access to thread %p (core %d)", thread, core);
 
 		k_thread_start(thread);