ixgbe: fix static functions

Define functions as static added C=1 (sparse) to my make line
brought these to my attention.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ixgbe/ixgbe_sriov.c b/drivers/net/ixgbe/ixgbe_sriov.c
index 6e50d83..4765027 100644
--- a/drivers/net/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ixgbe/ixgbe_sriov.c
@@ -110,7 +110,7 @@
 	return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add);
 }
 
-void ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 *msgbuf)
+static void ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 *msgbuf)
 {
 	struct ixgbe_hw *hw = &adapter->hw;
 	int new_mtu = msgbuf[1];