i965/vs: Abort on unsupported opcodes rather than failing.

Final code generation should never fail.  This is a bug, and there
should be no user-triggerable cases where this could occur.

Also, we're not going to have a fail() method after the split.

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
1 file changed