i40e: fix passing wrong error code to i40e_open()

The commit 6c167f582ea9 ("i40e: Refactor and cleanup i40e_open(), adding i40e_vsi_open()") introduced a new function i40e_vsi_open() with the regression by a typo. Due to the commit, the wrong error code would be passed to i40e_open(). Fix this error in i40e_vsi_open() by turning the macro into a negative value so that i40e_open() could return the pertinent error code correctly.

---
3.14 appears to be affected. Petition for -stable.

 drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index cf0761f08911..71dfd79f391a 100644
@@ -4310,7 +4310,7 @@ int i40e_vsi_open(struct i40e_vsi *vsi)
 		goto err_setup_rx;
 
 	if (!vsi->netdev) {
-		err = EINVAL;
+		err = -EINVAL;
 		goto err_setup_rx;
 	}
 	snprintf(int_name, sizeof(int_name) - 1, "%s-%s",

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Thanks Jean, I have added it to my queue.