ALSA: tidyup SNDRV_PCM_TRIGGER_xxx numbering

pcm.h has SNDRV_PCM_TRIGGER_xxx, but it is missing "2".
Fixup it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87ed3gsziy.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>