i965: Bump GL_MAX_CUBE_MAP_TEXTURE_SIZE to 8192.
Gen4+ supports 8192x8192 cube maps. Ivybridge and later can actually support 16384, but that would place GL_MAX_CUBE_MAP_TEXTURE_SIZE above GL_MAX_TEXTURE_SIZE, which seems like a bad idea. (Unfortunately, we can't bump GL_MAX_TEXTURE_SIZE to 16384 without causing regressions due to awful W-tiled stencil buffer interactions.) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74130 Signed-off-by:Kenneth Graunke <kenneth@whitecape.org> Reviewed-by:
Jordan Justen <jordan.l.justen@intel.com> Reviewed-by:
Ian Romanick <ian.d.romanick@intel.com>