ARM: dts: gemini: Use a level-high interrupt for TVE200

TVE200's interrupt is configured as rising-edge. On the D-Link DIR-685,
this can stop interrupt delivery after the first vertical interrupt,
causing vblank and page-flip timeouts and delaying framebuffer console
startup.

The vertical interrupt can remain pending after acknowledgment. Use
level-high triggering so the pending condition is delivered again
without requiring another edge.

Fixes: d2b85241a9f5 ("ARM: dts: Add TVE200 to the Gemini SoC DTSI")
Assisted-by: LLM
Signed-off-by: Linus Walleij <linusw@kernel.org>
Message-ID: <20260921-gemini-tve200-fix-v1-2-8be03ac2a8f7@kernel.org>