ASoC: soc-component: remove CONFIG_DEBUG_FS for debugfs_prefix

ASoC: soc-component: remove CONFIG_DEBUG_FS for debugfs_prefix

Both (A) and (B) have debugfs_prefix, but (B) is using CONFIG_DEBUG_FS (C)

(A)	struct snd_soc_component {
		...
		const char *debugfs_prefix;
	};

(B)	struct snd_soc_component_driver {
		...
(C)	ifdef CONFIG_DEBUG_FS
		const char *debugfs_prefix;
	endif
	};

Remove (C) which makes code cleanup difficult.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87jyshk5wc.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>