i965/gen7: expose OpenGL 4.2 on Haswell when supported

GL_ARB_vertex_attrib_64bit was the last piece missing.

v2: update docs (Jordan)

Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
diff --git a/docs/features.txt b/docs/features.txt
index efa780f..dd40ac4 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -136,7 +136,7 @@
   GL_ARB_transform_feedback3                            DONE (i965/gen7+, llvmpipe, softpipe, swr)
 
 
-GL 4.1, GLSL 4.10 --- all DONE: i965/gen8+, nvc0, r600, radeonsi
+GL 4.1, GLSL 4.10 --- all DONE: i965/hsw+, nvc0, r600, radeonsi
 
   GL_ARB_ES2_compatibility                              DONE (i965, nv50, llvmpipe, softpipe, swr)
   GL_ARB_get_program_binary                             DONE (0 binary formats)
@@ -146,7 +146,7 @@
   GL_ARB_viewport_array                                 DONE (i965, nv50, llvmpipe, softpipe)
 
 
-GL 4.2, GLSL 4.20 -- all DONE: i965/gen8+, nvc0, radeonsi
+GL 4.2, GLSL 4.20 -- all DONE: i965/hsw+, nvc0, radeonsi
 
   GL_ARB_texture_compression_bptc                       DONE (i965, r600)
   GL_ARB_compressed_texture_pixel_storage               DONE (all drivers)