sound: usb: Fix compile warnings

Fix the following compiler warning(s) from gcc 6.1.1 with -Werror enabled:

 sound/usb/usb_audio_qmi_svc.c:1238:
   too many arguments for format [-Werror=format-extra-args]
   uaudio_dbg("node:\n", node);

Fixes: 30374c02 ("sound: usb: move debug logging in uaudio_qmi_svc_disconnect_cb function")
Change-Id: Ic0dedbad512985fdec8441c987a26d33d189a0dc
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>