memory: mtk-smi: Add basic support for MT6779

Add smi-larb and smi-common nodes and config_port for MT6779.

changelog since v2:
Split basic nodes and config_port support from initial golden setting patch

Signed-off-by: Ming-Fan Chen <ming-fan.chen@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/1578465691-30692-4-git-send-email-ming-fan.chen@mediatek.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>