arm64: dts: exynos: Remove the te-gpios property in the TM2 boards

The decon uses HW-TRIGGER, so TE interrupt is not necessary.
Therefore, remove the te-gpios property in the TM2 dts.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>