msm: camera: fix bug in camera msm_vb2 implementation

Upon every buf done, we should set the msm_vb2 buffer's in free_q
field to zero, like we do for every put buf. This is in consistence
with the design and ensures proper buffer circulation.

Change-Id: I484d400b55d57afa957ef90ce4b303cffeb74d5b
Signed-off-by: Ankit Premrajka <ankitp@codeaurora.org>

drivers/media/platform/msm/camera_v2/msm_vb2/msm_vb2.c

@@ -172,6 +172,7 @@ static int msm_vb2_buf_done(struct vb2_buffer *vb, int session_id,
 		/* put buf before buf done */
 		if (msm_vb2->in_freeq) {
 			vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+			msm_vb2->in_freeq = 0;
 			rc = 0;
 		} else
 			rc = -EINVAL;