i40e/base: fix proxy for X722

i40e/base: fix proxy for X722

The recently added proxy opcodes should be available only with
X722_SUPPORT, so move them into the #ifdef, and reorder these
to be in numerical order with the rest of the opcodes. Several
structs that were added are unnecessary, so they are removed
here.

Fixes: 788fc17b2dec ("i40e/base: support proxy config for X722")
Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Remy Horton <remy.horton@intel.com>