arm64: dts: Stingray: Fix I2C controller interrupt type

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

Fixes: 1256ea18

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