axfer: handle -ETIMEDOUT before handle mmap I/O operation

axfer: handle -ETIMEDOUT before handle mmap I/O operation

When running for IRQ-based scheduling model, transmission backend is
expected to queue PCM event in different context from the main thread.
When queueing no events during time equivalent to one period of PCM
buffer, the backend has problems.

This commit outputs report it for mmap operation for IRQ-based
scheduling model. The timeout is equivalent to all frames in buffer,
instead of period for safe.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>