fpga: dfl: fme-region: add support for compat_id

This patch adds compat_id support, it reuses fme manager's
compat id, as the per region compat id is actually from the
fme manager's register.

Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Alan Tull <atull@kernel.org>
Acked-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>