ALSA: control: Drop superfluous ifdef CONFIG_SND_CTL_DEBUG

Compilers should be smart enough to optimize out the dead functions,
so we don't need to define ugly dummy functions with ifdef.

Link: https://lore.kernel.org/r/20220609120219.3937-4-tiwai@suse.de


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