sound: Retire CHN_SETVOLUME() and use chn_setvolume_matrix()

CHN_SETVOLUME() is just a wrapped around chn_setvolume_matrix() anyway,
so use it directly.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D55992

sys/dev/sound/pcm/channel.c

@@ -143,7 +143,7 @@ chn_vpc_proc(int reset, int db)
 		PCM_ACQUIRE(d);
 		CHN_FOREACH(c, d, channels.pcm) {
 			CHN_LOCK(c);
-			CHN_SETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_VOL_0DB, db);
+			chn_setvolume_matrix(c, SND_VOL_C_PCM, SND_CHN_T_VOL_0DB, db);
 			if (reset != 0)
 				chn_vpc_reset(c, SND_VOL_C_PCM, 1);
 			CHN_UNLOCK(c);
@@ -1635,7 +1635,7 @@ chn_vpc_reset(struct pcm_channel *c, int vc, int force)
 		return;
 
 	for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; i += SND_CHN_T_STEP)
-		CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]);
+		chn_setvolume_matrix(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]);
 }
 
 static u_int32_t

sys/dev/sound/pcm/channel.h

@@ -306,8 +306,6 @@ int chn_notify(struct pcm_channel *c, u_int32_t flags);
 int chn_getrates(struct pcm_channel *c, int **rates);
 int chn_syncdestroy(struct pcm_channel *c);
 
-#define CHN_SETVOLUME(...)		chn_setvolume_matrix(__VA_ARGS__)
-
 #define CHN_GETMUTE(x, y, z)		((x)->muted[y][z])
 
 #ifdef OSSV4_EXPERIMENT

sys/dev/sound/pcm/matrix.h

@@ -176,8 +176,7 @@
 /*
  * Multichannel interleaved volume matrix. Each calculated value relative
  * to master and 0db will be stored in each CLASS + 1 as long as
- * chn_setvolume_matrix() or the equivalent CHN_SETVOLUME() macros is
- * used (see channel.c).
+ * chn_setvolume_matrix() is used (see channel.c).
  */
 #define SND_VOL_C_MASTER	0
 #define SND_VOL_C_PCM		1