arm64: dts: intel: socfpga_agilex: use defined GIC interrupt type for ECC

Use defined GIC interrupt type instead of hard-coded numbers for ECC
(Error Correction Code) memory, which creates edac sysfs interface.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>