i965: Bump maximum supported ES2 context version to 3.0
Since patch "i965: Validate requested GLES context version in brwCreateContext", we have been able to create ES 3.0 contexts due to the max version check. So...bump the max version. Reviewed-by:Kenneth Graunke <kenneth@whitecape.org> Reviewed-by:
Ian Romanick <ian.d.romanick@intel.com> Signed-off-by:
Chad Versace <chad.versace@linux.intel.com>