gk110/ir: emit texbar the same way that the blob does

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedestkop.org>
gk110: add in forgotten code for gk110 isa

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
nvc0: don't bother trying to set up compute for gk110+

The nouveau fw currently prints a bunch of errors. No point in seeing
those all the time, esp since compute doesn't really work in the first
place.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>