IB/mthca: Coverity fix to mthca_init_eq_table()

Fix bug found by coverity: the loop body never executed, because it
was doing for (i = 0; i < MTHCA_EQ_CMD; ++i), but MTHCA_EQ_CMD is 0.
The correct loop bound is MTHCA_NUM_EQ, to loop over all EQs.
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/mthca/mthca_eq.c

@@ -928,7 +928,7 @@ int __devinit mthca_init_eq_table(struct mthca_dev *dev)
 		mthca_warn(dev, "MAP_EQ for cmd EQ %d returned status 0x%02x\n",
 			   dev->eq_table.eq[MTHCA_EQ_CMD].eqn, status);
 
-	for (i = 0; i < MTHCA_EQ_CMD; ++i)
+	for (i = 0; i < MTHCA_NUM_EQ; ++i)
 		if (mthca_is_memfree(dev))
 			arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask);
 		else