pcm_file: use EIO instead of EPIPE when failing to write output file

pcm_file: use EIO instead of EPIPE when failing to write output file

EPIPE is defined as XRUN which is not entirely correct in this condition

failing to write to a file in pcm_file plugin can not be simply recovered
by a retry as user of the api might be led to believe when receiving EPIPE

use EIO instead to indicate a different kid of error that may not be
recoverable by retry

Signed-off-by: Adam Miartus <amiartus@de.adit-jv.com>
Reviewed-by: Timo Wischer <twischer@de.adit-jv.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>