ARM: dts: exynos: drop fake align STMPE properties in P4 Note

From STMPE device node in P4 Note remove unused irq-trigger property and
incorrectly placed interrupt-controller (which would be a property of
GPIO child).

Link: https://lore.kernel.org/r/20230225164050.42522-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>