i40e: store msg_enable in the right size

The kernel returns a u32 for netif_msg_init, and we were storing
it in a u16.  Fix the width of the datatype.

Change-ID: I4b23326e5707c91cd59325c5a1ccb2ba7a3974fc
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e.h

@@ -276,7 +276,7 @@ struct i40e_pf {
 	enum i40e_interrupt_policy int_policy;
 	u16 rx_itr_default;
 	u16 tx_itr_default;
-	u16 msg_enable;
+	u32 msg_enable;
 	char int_name[I40E_INT_NAME_STR_LEN];
 	u16 adminq_work_limit; /* num of admin receive queue desc to process */
 	unsigned long service_timer_period;