bnx2x: fix compilation without CONFIG_BNX2X_SRIOV

Move mutex initialization by allocation of the mailbox it protects.

introduced in commit 1d6f3cd8 'bnx2x: Prevent VF race'
Signed-off-by: NDmitry Kravkov <dmitry@broadcom.com>
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -12522,7 +12522,6 @@ static int bnx2x_init_one(struct pci_dev *pdev,
 	 */
 	if (IS_VF(bp)) {
 		bp->doorbells = bnx2x_vf_doorbells(bp);
-		mutex_init(&bp->vf2pf_mutex);
 		rc = bnx2x_vf_pci_alloc(bp);
 		if (rc)
 			goto init_one_exit;

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

@@ -3425,6 +3425,8 @@ void __iomem *bnx2x_vf_doorbells(struct bnx2x *bp)
 
 int bnx2x_vf_pci_alloc(struct bnx2x *bp)
 {
+	mutex_init(&bp->vf2pf_mutex);
+
 	/* allocate vf2pf mailbox for vf to pf channel */
 	BNX2X_PCI_ALLOC(bp->vf2pf_mbox, &bp->vf2pf_mbox_mapping,
 			sizeof(struct bnx2x_vf_mbx_msg));