usb typec: mt6360: Add support for mt6360 Type-C driver

Mediatek MT6360 is a multi-functional IC that includes USB Type-C.
It works with Type-C Port Controller Manager to provide USB PD
and USB Type-C functionalities.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/1598928042-22115-1-git-send-email-u0084500@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>