Decrease usb buffering to verbose logging.
diff --git a/usbutils.c b/usbutils.c
index e67cb6c..ab5748b 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -2671,7 +2671,7 @@ int _usb_read(struct cgpu_info *cgpu, int epinfo, char *buf, size_t bufsiz, int
memcpy(usbdev->buffer, usbbuf + bufsiz, usbdev->bufamt);
tot -= usbdev->bufamt;
usbbuf[tot] = '\0';
- applog(LOG_ERR, "USB: %s%i read1 buffering %d extra bytes",
+ applog(LOG_INFO, "USB: %s%i read1 buffering %d extra bytes",
cgpu->drv->name, cgpu->device_id, usbdev->bufamt);
}