Fix off-by-one max mip levels in getSRV. We would try to create SRVs with zero mip levels, when we should be asking for a single mip level. This would happen when the base level is equal to the max level. See the dEQP test: texture.mipmap.2d.max_level.linear_nearest Change-Id: I3f231f159dbdecbf7c2e61b373bfc3545875f36e Reviewed-on: https://chromium-review.googlesource.com/240762 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Brandon Jones <bajones@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>