pcm: Fix a wrong value shown in the error message in rate plugin

Signed-off-by: Takashi Iwai <tiwai@suse.de>
UCM: Document some standard values

Playback/CaptureChannels has been around for a bit. Playback/CaptureRate
is new and is intended to be used to specify the sample rate at which
the Playback/CapturePCM should be opened.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
hdspm.h: Update LTC ioctl to use struct hdspm_ltc

Use struct hdspm_ltc to query the LTC, using a mixer struct was just
plain wrong.

Due to the wrong struct, this ioctl was never working, so we're free to
fix it without breaking userspace compatibility.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Update iatomic.h functions definitions for mips

Functions atomic_add(s) and atomic_sub(s) are defined with 'extern
__inline__' that may cause compile fails when cross compile for mips.
The error message looks like:

| pcm/.libs/libpcm.a(pcm_meter.o): In function `snd_pcm_meter_update_scope':
| .../alsa-lib-1.0.27.2/src/pcm/pcm_meter.c:139: undefined reference to `atomic_sub'

Replace the 'extern __inline__' with 'static __inline__' to fix this
issue.

Signed-off-by: Kai Kang <jiashuo.kang at gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>