linux-phytec-ti

Bluetooth: bnep: Return err value while sending cmd is not understood

Send command not understood response should be verified if it was
successfully sent, like all send responses.

Signed-off-by: Grzegorz Kolodziejczyk <grzegorz.kolodziejczyk@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>