Missed .owner of struct snd_soc_card will prevent the module from being
removed from underneath its users.
Reported-by: NLothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>