Add initial support for Mediatek mt6582 and Prestigio
PMT5008 3G tablet, 4 uart, wdt work, init loads successfully. SMP doesn't
work.
Signed-off-by: NMaxim Kutnij <gtk3@inbox.ru>
Link: https://lore.kernel.org/r/20211219183134.3849-1-gtk3@inbox.ru
[mb: fix commit subject line]
Signed-off-by: NMatthias Brugger <matthias.bgg@gmail.com>