runtime: remove the meaningless offset of 8 for duffzero on loong64
Currently we subtract 8 from offset when calling duffzero because 8
is added to offset in the duffzero implementation. This operation is
meaningless, so remove it.
Change-Id: I7e451d04d7e98ccafe711645d81d3aadf376766f
Reviewed-on: https://go-review.googlesource.com/c/go/+/487295 Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Meidan Li <limeidan@loongson.cn> Reviewed-by: WANG Xuerui <git@xen0n.name>
Run-TryBot: WANG Xuerui <git@xen0n.name>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: xiaodong liu <teaofmoli@gmail.com> Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>