pcm_hw: Always use delay ioctl in snd_pcm_delay()

pcm_hw: Always use delay ioctl in snd_pcm_delay()

As the result of snd_pcm_delay() is affected not only by hw_ptr
and appl_ptr, but also by 'runtime->delay' property,
either SNDRV_PCM_IOCTL_DELAY or SNDRV_PCM_IOCTL_STATUS ioctl
must be used to get the correct result.

Previously 'runtime->delay' was ignored in case 'hw->sync_ptr'
was used.

Signed-off-by: Kai Vehmanen <kvehmanen@eca.cx>
Signed-off-by: Takashi Iwai <tiwai@suse.de>