Keep the list of SoCs in a single place and include it so that the
documentation won't get outdated.
Fixes: 8f5ea6a464ac ("config/arm: fix implementer and its SoCs")
Fixes: 1b4c86a721c9 ("config/arm: add Marvell CN10K")
Fixes: 7cf32a22b240 ("config/arm: add Hisilicon kunpeng")
Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Jerin Jacob <jerinj@marvell.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
c3946acf22