arm64: dts: ns2: Fix I2C controller interrupt type

Fix I2C controller interrupt to use IRQ_TYPE_LEVEL_HIGH for Broadcom NS2
SoC.

Fixes: 7ac674e8 ("arm64: dts: Add I2C nodes for NS2")
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>