MFP4 (109713):

Add OSS_GETVERSION ioctl for compatibility.

Some ports expect this and fail to compile on -current ATM.

Submitted by:	ryanb

sys/dev/sound/pcm/mixer.c

@@ -830,6 +830,9 @@ mixer_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, struct thread
 	case SNDCTL_DSP_SET_RECSRC:
 		ret = mixer_set_recroute(m, *arg_i);
 		break;
+	case OSS_GETVERSION:
+		*arg_i = SOUND_VERSION;
+		break;
 	default:
 		ret = ENXIO;
 	}

sys/sys/soundcard.h

@@ -1608,6 +1608,11 @@ typedef unsigned short oss_peaks_t[MAX_PEAK_CHANNELS];
 #define SNDCTL_DSP_GETOPEAKS		_IOR('P', 44, oss_peaks_t)
 #define SNDCTL_DSP_POLICY               _IOW('P', 45, int)    /* See the manual */
 
+/*
+ * OSS_SYSIFO is obsolete. Use SNDCTL_SYSINFO insteads.
+ */
+#define OSS_GETVERSION                  _IOR ('M', 118, int)
+
 /**
  * @brief	Argument for SNDCTL_SYSINFO ioctl.
  *