rawmidi: Use the standard types for snd_rawmidi_framing_tstamp_t definition
rawmidi: Use the standard types for snd_rawmidi_framing_tstamp_t definition

Using the kernel-specific types like __u8 breaks the compilation of
applications.  Also we need the packed attribute.

Although we may want to move to an opaque type later, let's put the
workaround at first.

Fixes: https://github.com/alsa-project/alsa-lib/issues/172
Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>

tiwai/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib,tiwai/alsa-lib,alsa-project/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib