There are a few leftover CONFIG_PROC_FS forgotten to replace with
CONFIG_SND_PROC_FS.

Fixes: cd6a6503 ('ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS')
Reported-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>