cmd/compile/internal/ssa: re-run generator

CL 163760 was submitted with this file generated from an old version
of the code generator.

Change-Id: I9a3b9a48f794f74567f82ef58637cb1820befd11
Reviewed-on: https://go-review.googlesource.com/c/go/+/167677


Reviewed-by: Richard Musiol <neelance@gmail.com>