ALSA: emu10k1: fix error handling in snd_audigy_i2c_volume_put()

Check all inputs before changing anything, and return the right error
code in case of failure.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230422161021.1144026-1-oswald.buddenhagen@gmx.de


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