Mark switch cases where we are expecting to fall through.

This patch fixes the following warning:

sound/oss/dmasound/dmasound_atari.c: warning: this statement may fall
through [-Wimplicit-fallthrough=]:  => 1449:24

Notice that, in this particular case, the code comment is
modified in accordance with what GCC is expecting to find.

Reported-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Gustavo A. R. Silva <[email protected]>
---
 sound/oss/dmasound/dmasound_atari.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/oss/dmasound/dmasound_atari.c 
b/sound/oss/dmasound/dmasound_atari.c
index 83653683fd68..b5845e904ba1 100644
--- a/sound/oss/dmasound/dmasound_atari.c
+++ b/sound/oss/dmasound/dmasound_atari.c
@@ -1449,7 +1449,7 @@ static int FalconMixerIoctl(u_int cmd, u_long arg)
                tt_dmasnd.input_gain =
                        RECLEVEL_VOXWARE_TO_GAIN(data & 0xff) << 4 |
                        RECLEVEL_VOXWARE_TO_GAIN(data >> 8 & 0xff);
-               /* fall thru, return set value */
+               /* fall through - return set value */
            case SOUND_MIXER_READ_MIC:
                return IOCTL_OUT(arg,
                        RECLEVEL_GAIN_TO_VOXWARE(tt_dmasnd.input_gain >> 4 & 
0xf) |
-- 
2.22.0

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