pcm: hw: do not reset tstamp_type in SND_PCM_APPEND mode (#2)

pcm: hw: do not reset tstamp_type in SND_PCM_APPEND mode (#2)

This is basically redo of all changed and add appropriate conditions
to disable only ioctl calls, but preserve tstamp_type assignments.

Fixes: 15f2b276 ("pcm: hw: fix default timestamp type for O_APPPEND")
Fixes: 7e01443e ("pcm: hw: do not reset tstamp_type in SND_PCM_APPEND mode")
Link: https://github.com/alsa-project/alsa-lib/pull/450
Suggested-by: Signed-off-by: Kevin Groeneveld <kgroeneveld@lenbrook.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>