card->owner is a required property and since commit 81033c6b ("ALSA:
core: Warn on empty module") a warning is issued if it is empty. Add it.
This fixes following warning observed on Lamobo R1:

WARNING: CPU: 1 PID: 190 at sound/core/init.c:207 snd_card_new+0x430/0x480 [snd]
Modules linked in: sun4i_codec(E+) sun4i_backend(E+) snd_soc_core(E) ...
CPU: 1 PID: 190 Comm: systemd-udevd Tainted: G         C  E     5.10.0-1-armmp #1 Debian 5.10.4-1
Hardware name: Allwinner sun7i (A20) Family
Call trace:
 (snd_card_new [snd])
 (snd_soc_bind_card [snd_soc_core])
 (snd_soc_register_card [snd_soc_core])
 (sun4i_codec_probe [sun4i_codec])

Fixes: 45fb6b6f ("ASoC: sunxi: add support for the on-chip codec on early Allwinner SoCs")
Related: commit 3c27ea23 ("ASoC: qcom: Set card->owner to avoid warnings")
Related: commit ec653df2 ("drm/vc4/vc4_hdmi: fill ASoC card owner")
Cc: linux-arm-kernel@lists.infradead.org
Cc: alsa-devel@alsa-project.org
Signed-off-by: Bastian Germann <bage@linutronix.de>
Link: https://lore.kernel.org/r/20210331151843.30583-1-bage@linutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>