hw/intc/loongarch_pch: Use relative address in MemoryRegionOps

Parameter address for read and write callback in MemoryRegionOps is
relative offset with base address of this MemoryRegionOps. It can
be directly used as offset and offset calculation can be removed.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20250507023148.1877287-6-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
1 file changed