msm: wfd: Don't enforce FIFO ordering when buffers are returned

Buffers can be returned out of order in certain situations.  As such VSG
shouldn't be expecting buffers to returned in order.

Change-Id: I2db4baf6b2196fd084e47fcb17ac1b8ec065b58a
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>