From: Yassine Oudjana <y.oudjana@xxxxxxxxxxxxxx>
Add a driver for the MediaTek MT6735 SoC pin controller. This driver
also supports the pin controller on MT6735M, which lacks 6 physical
pins (198-203) used for MSDC2 on MT6735.
Signed-off-by: Yassine Oudjana <y.oudjana@xxxxxxxxxxxxxx>