ASoC: soc-core: remove unnecessary message from snd_soc_register_component()

No need to print an error message if kzalloc fails.
The core will print it.

Reported-by: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>