Fix wrong error checks of *_ch_mode_put() in patch_realtek.c and
patch_analog.c.  snd_hda_ch_mode_put() could return a positive
value for success, too.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>