ARM: dts: exynos: Correct GPU regulator properties in Galaxy I9100

The regulator property 'regulator-microvolt-offset' should be put next
to regulator definition, not consumer.

The property 'regulator-microsecs-delay' is not valid at all.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200830135200.24304-2-krzk@kernel.org