ASoC: topology: Drop superfluous check of CONFIG_SND_CTL_VALIDATION

The compiler must be clever enough to optimize out for the no-op when
CONFIG_SND_CTL_VALIDATION is disabled.  Let's drop the superfluous
check.

Link: https://lore.kernel.org/r/20220609120219.3937-2-tiwai@suse.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>