AFMT_S24_LE is set twice in return value

vi sound/core/oss/pcm_oss.c +640
#define AFMT_S24_LE      0x00008000
#define AFMT_S24_BE      0x00010000

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>