cmd/internal/obj/mips: mark restartable sequences
cmd/internal/obj/mips: mark restartable sequences

Following CL 208126, do the same for MIPS.

Change-Id: I95f8fc99a234524119a4d29c7695676dc0ea1025
Reviewed-on: https://go-review.googlesource.com/c/go/+/208217
Run-TryBot: Cherry Zhang <d62e63aa42ce272d7b6a5055d97e942b33a34679@google.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Austin Clements <7ea35d812706d9213868749011af1ed4fa2f6aa0@google.com>

CAFxX/go,akutz/go,cloudflare/go,cloudflare/go,golang/go,golang/go,golang/go,nawawi/go,cloudflare/go,nawawi/go,CAFxX/go,golang/go,CAFxX/go,nawawi/go,golang/go,golang/go,cloudflare/go,cloudflare/go,golang/go,nawawi/go,CAFxX/go,CAFxX/go,cloudflare/go,akutz/go,cloudflare/go,CAFxX/go,cloudflare/go,akutz/go,nawawi/go,akutz/go,nawawi/go,akutz/go,nawawi/go,akutz/go,CAFxX/go,CAFxX/go,golang/go,nawawi/go,akutz/go,akutz/go