Also, fix latency for NEG_S and NEG_D on mips.

Change-Id: I74626a787c67f79d430e55e715446d21b39ef937
Reviewed-on: https://chromium-review.googlesource.com/1088611Reviewed-by: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Commit-Queue: Sreten Kovacevic <sreten.kovacevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#53550}