arm64: dts: exynos: correct S3FWRN5 NFC interrupt trigger level on TM2

The S3FWRN5 datasheet describe the interrupt line as rising edge.  The
current configuration as level high, could cause spurious interrupts.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210211859.215047-1-krzk@kernel.org