In mtk_devapc_probe(), if of_iomap succeeds and any following error occurs,
it needs to deallocate the resource.
Fix this by repalcing of_iomap with devm_platform_ioremap_resource, which
automatically self-manages the resource. This can avoid modifying error
handling code.
Signed-off-by: zhengkang huang <zkhuang@xxxxxxxxxxx>
Reviewed-by: Dongliang Mu <dzm91@xxxxxxxxxxx>