The Exynos Thermal Management Unit binding says that the vtmu-supply
is optional but is listed in the required properties section. Add an
optional properties section and move the regulator property there.
Acked-by: NRob Herring <robh@kernel.org>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NAndi Shyti <andi.shyti@samsung.com>
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NEduardo Valentin <edubezval@gmail.com>