i40e: Convert CEE App TLV selector to IEEE selector

i40e: Convert CEE App TLV selector to IEEE selector

Orabug: 22342532

Changes the parsing of CEE App TLVs to fill in the App selector in struct
i40e_dcbx_config with the IEEE App selector so the caller doesn't have to
consider whether the App came from a CEE or IEEE DCBX negotiation.

Change-ID: Ia7d9d664cde04d2ebcc9822fd22e4929c6edab3a
Signed-off-by: Greg Bowers <gregory.j.bowers@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 41c3ae8b726e07e366fdb63e0e40a33528f1c3e4)
Signed-off-by: Brian Maly <brian.maly@oracle.com>