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

Fixes: fd5e5dd5 ("arm64: dts: Add PCIe0 and PCIe4 DT nodes for NS2")
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>