bus/ifpga: add AFU shared data
bus/ifpga: add AFU shared data

AFU can be implemented into many different acceleration
devices, these devices need shared data to store private
information when they are handled by users.

Signed-off-by: Rosen Xu <8f603db01337dbfe2ce4743ebc0cdbcec6fa456f@intel.com>
Signed-off-by: Andy Pei <495968cb2b3cf2ab5bd53dc54ba9a3450dc45709@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk