nvc0: enable compute support by default on GK110+
nvc0: enable compute support by default on GK110+

Compute support seems to be pretty stable now, and according to piglit
it doesn't seem to break 3D state.

As a side effect, this will expose ARB_compute_shader on GK110/GK208.

Signed-off-by: Samuel Pitoiset <506e97eed81d9e59d22f4c73fb51123bb62b4a30@gmail.com>
Reviewed-by: Ilia Mirkin <bcbbb7aa705ec3a5fc5824c01a845186c3d62fca@alum.mit.edu>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler