mesa/extensions: Wrap array entries in macros

mesa/extensions: Wrap array entries in macros

Now that we're using macros, remove the redundant text from each entry.

Remove comments between the entries to make editing easier and separate
the sections with blank lines. Structure the EXT macros in a way that
helps reviewers verify that no meaning has been altered.

v2: Indent the entries (Chad)

Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Chad Versace <chad.versace@intel.com>