i40evf: don't violate scope

Move a declaration up one level so we don't dereference it out of scope.
This didn't cause any panics, but the details->async field would
mysteriously disappear, causing unnecessary delays when sending AQ
commands. Also, the code is just plain wrong.

Change-ID: I753f64f13c55e5d75ea4351e29b14fb53b2f0104
Signed-off-by: Mitch Williams <[e-mail]>
Tested-by: Jim Young <[e-mail]>
Signed-off-by: Jeff Kirsher <[e-mail]>

drivers/net/ethernet/intel/i40evf/i40e_common.c

···
 				struct i40e_asq_cmd_details *cmd_details)
 {
 	struct i40e_aq_desc desc;
+	struct i40e_asq_cmd_details details;
 	i40e_status status;
 
 	i40evf_fill_default_direct_cmd_desc(&desc, i40e_aqc_opc_send_msg_to_pf);
···
 		desc.datalen = cpu_to_le16(msglen);
 	}
 	if (!cmd_details) {
-		struct i40e_asq_cmd_details details;
 		memset(&details, 0, sizeof(details));
 		details.async = true;
 		cmd_details = &details;