bnx2x: fix pf2vf bulletin DMA mapping leak

When freeing VF's DMA mappings, an already NULLed pointer was checked
again due to an apparent copy&paste error. Consequently, the pf2vf
bulletin DMA mapping was not freed.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c

@@ -3042,7 +3042,7 @@ void bnx2x_vf_pci_dealloc(struct bnx2x *bp)
 {
 	BNX2X_PCI_FREE(bp->vf2pf_mbox, bp->vf2pf_mbox_mapping,
 		       sizeof(struct bnx2x_vf_mbx_msg));
-	BNX2X_PCI_FREE(bp->vf2pf_mbox, bp->pf2vf_bulletin_mapping,
+	BNX2X_PCI_FREE(bp->pf2vf_bulletin, bp->pf2vf_bulletin_mapping,
 		       sizeof(union pf_vf_bulletin));
 }