staging/fsl_qbman: Recalcuate cursor after consuming ring

If the dqrr_init() function consumes frames during init
the cursor needs to be updated before anything starts
to use the ring.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>

drivers/staging/fsl_qbman/qman_low.h

@@ -682,6 +682,9 @@ static inline int qm_dqrr_init(struct qm_portal *portal,
 		(0 ? 0x10 : 0);				/* Ignore SP */
 	qm_out(CFG, cfg);
 	qm_dqrr_set_maxfill(portal, max_fill);
+
+	/* Recalculate cursor as we may have consumed frames */
+	dqrr->cursor = dqrr->ring + dqrr->ci;
 	return 0;
 }