dt-bindings: clock: mediatek: add pericfg for MT8183

This patch adds binding of pericfg for MT8183.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lkml.kernel.org/r/1566980533-28282-1-git-send-email-chunfeng.yun@mediatek.com


Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>