ixgbe: Fix compiler warnings

Wrap SR-IOV specific functions in CONFIG_PCI_IOV to avoid compiler
warnings.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
index 5a7e1eb..4a5d889 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
@@ -42,10 +42,12 @@
 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
 			    int vf, struct ifla_vf_info *ivi);
 void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter);
+#ifdef CONFIG_PCI_IOV
 void ixgbe_disable_sriov(struct ixgbe_adapter *adapter);
 void ixgbe_enable_sriov(struct ixgbe_adapter *adapter,
 			const struct ixgbe_info *ii);
 int ixgbe_check_vf_assignment(struct ixgbe_adapter *adapter);
+#endif
 
 
 #endif /* _IXGBE_SRIOV_H_ */