ALSA: usb-audio: fix spelling mistake "buss" -> "bus"

There is a spelling mistake in a usb_audio_dbg debug message. Also
replace "param" with "parameter".  Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200806105134.46447-1-colin.king@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>