MediaTek's ovl_adaptor driver requires the alias IDs of the MERGE
components to be indexed from 1 to 5 to construct the MT8188 vdosys1
routing path, since merge0 is particularly reserved for vdosys0
according to the mmsys routing tables.
Update the alias IDs to ensure that ovl_adaptor can find the correct
MERGE components, allowing DRM to initialize without issues.
Fixes: b13ecb7c6f67 ("arm64: dts: mediatek: mt8188: Add display nodes for vdosys1")
Signed-off-by: Fei Shao <fshao@xxxxxxxxxxxx>