igbvf: Update module identification strings

Update adapter identification strings to properly indicate i350 VF devices
in the VF driver. Change the driver ID string to remove 82576-specific
wording. Update copyright date.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>