i40e: fix flags declaration

Since we don't yet have more than 32 flags, we'll use a u32 for both the
hw_features and flag field. Should we gain more flags in the future, we
may need to convert to a u64 or separate flags out into two fields.

This was overlooked in the previous commit 2781de2134c4 ("i40e/i40evf:
organize and re-number feature flags"), where the feature flag was not
converted form u64 to u32.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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

@@ -424,7 +424,7 @@ struct i40e_pf {
 #define I40E_HW_PORT_ID_VALID			BIT(17)
 #define I40E_HW_RESTART_AUTONEG			BIT(18)
 
-	u64 flags;
+	u32 flags;
 #define I40E_FLAG_RX_CSUM_ENABLED		BIT(0)
 #define I40E_FLAG_MSI_ENABLED			BIT(1)
 #define I40E_FLAG_MSIX_ENABLED			BIT(2)