ASoC: soc-core: merge soc_set_name_prefix() and soc_set_of_name_prefix()

soc_set_name_prefix() is calling soc_set_of_name_prefix().
We don't need to separate these operation.
This patch merges these.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87fthrbhzo.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>