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

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>

src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp

@@ -967,7 +967,7 @@ void CodeEmitterGK110::emitSELP(const Instruction *i)
 
 void CodeEmitterGK110::emitTEXBAR(const Instruction *i)
 {
-   code[0] = 0x00000002 | (i->subOp << 23);
+   code[0] = 0x0000003e | (i->subOp << 23);
    code[1] = 0x77000000;
 
    emitPredicate(i);