i40e: correct spelling error

Turns out that 'inavlid' is an inavlid spelling for 'invalid'.

Change-ID: Ie1fe2d0f8d1ba75ab880594875ec2e4152a76f61
Signed-off-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_ethtool.c

@@ -2546,7 +2546,7 @@ static int i40e_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
  * @indir: indirection table
  * @key: hash key
  *
- * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
+ * Returns -EINVAL if the table specifies an invalid queue id, otherwise
  * returns 0 after programming the table.
  **/
 static int i40e_set_rxfh(struct net_device *netdev, const u32 *indir,