staging: most: include vendor in audio card's shortname

This patch adds Microchip as vendor to the audio card's shortname to
be displayed, when playback and capture devices are queried.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>