ASoC: mediatek: mt8195-mt6359: reduce log verbosity in probe()

Eliminates error messages if snd_soc_register_card() failed.  Kernel
emits messages if device probe error anyway.

This is mainly for removing the following error messages during boot.
    >>> snd_soc_register_card fail -517

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20211220093408.207206-1-tzungbi@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>