i40e: Wrong truncation from u16 to u8

[ Upstream commit c004804dceee9ca384d97d9857ea2e2795c2651d ]

In this patch fixed wrong truncation method from u16 to u8 during
validation.

It was changed by changing u8 to u32 parameter in method declaration
and arguments were changed to u32.

Fixes: 5c3c48ac ("i40e: implement virtual device interface")
Signed-off-by: Grzegorz Siwik <grzegorz.siwik@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>