[ALPS08744099] arm64: dts: mt6989: fix slc-parity node

[Description]
add assert option for slc-parity node

[Test]
reboot

MTK-Commit-Id: 6e2a00d6f83893780f5164c67209a2832bf45b70

Signed-off-by: mtk31023 <meng-hsien.lin@mediatek.com>
CR-Id: ALPS08744099
Feature: slc api driver
Change-Id: Idb8b4e83ae6e20420a12c53a3200512e71eaeafb