i40e: Store lan_vsi_idx and lan_vsi_id in the right size

i40e: Store lan_vsi_idx and lan_vsi_id in the right size

Orabug: 22342532

lan_vsi_idx and lan_vsi_id are assigned to u16 data sized variables but
declared in u8. This patch fixes the width of the datatype.

Change-ID: If4bcbcc7d32f2b287c51cb33d17879691258dce2
Signed-off-by: Pandi Kumar Maharajan <pandi.maharajan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 071c859b878a05c3f603669bfda2e5b4332dd695)
Signed-off-by: Brian Maly <brian.maly@oracle.com>