COSA/SRP: convert channel_data.rsem to mutex

COSA/SRP driver: The semaphore channel_data.rsem is used as a mutex,
convert it to the mutex API

Signed-off-by: Matthias Kaehlcke <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
1 file changed