Chrome used to clamp it everywhere but in practice it is only needed on
these devices.

TEST=conformance/uniforms/out-of-bounds-uniform-array-access.html

Change-Id: Idffe84023f8b27733bfda209edd59bbb220b5c0c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1680054Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>