ALSA: dice: fix error path for initialization of stream structures

When introducing AMDTP domain to ALSA dice driver, error path does not
handle error correctly. This commit fixes the bug.

Fixes: e9f21129 ("ALSA: dice: support AMDTP domain")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>