intel: Use designated initializers for DRI extension structs
intel: Use designated initializers for DRI extension structs

All Intel code is compiled with -std=c99. There is no excuse to not use
designated initializers.

As a nice benefit, the code is now more friendly to grep. Without
designated initializers, psychic prowess is required to find the
initialization of DRI extension function pointers with grep.  I have
observed several people, when they first encounter the DRI code, fail at
statically chasing the DRI function pointers due to this problem.

Reviewed-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>
Acked-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>
Signed-off-by: Chad Versace <a557f7f75bf28dc19ac99107f5cc7cd6b3fbdb1a@linux.intel.com>

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