arm64: dts: mt8183: Add the mmsys reset bit to reset the dsi0

Reset the DSI hardware is needed to prevent different settings between
the bootloader and the kernel.

While here, also remove the undocumented and also not used
'mediatek,syscon-dsi' property.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210930103105.v4.5.I933f1532d7a1b2910843a9644c86a7d94a4b44e1@changeid
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arm64: dts: mediatek: Move reset controller constants into common location

The DT binding includes for reset controllers are located in
include/dt-bindings/reset/. Move the Mediatek reset constants in there.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20210930103105.v4.1.I514d9aafff3a062f751b37d3fea7402f67595b86@changeid
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>