freedreno/a6xx: WFI in program stateobj too

This "fixes" hangs seen w/ various android games.  I think a similar
issue to with constant state, we need to avoid CP_LOAD_STATE until
previous draw completes.

It isn't entirely clear why blob doesn't need to do this, but it might
have a different way to accomplish the same thing.

Signed-off-by: Rob Clark <robdclark@chromium.org>

src/gallium/drivers/freedreno/a6xx/fd6_program.c

@@ -326,6 +326,8 @@ setup_stateobj(struct fd_ringbuffer *ring, struct fd6_program_state *state,
 	uint8_t psize_loc = ~0;
 	int i, j;
 
+	OUT_WFI5(ring);
+
 	setup_stages(state, s, binning_pass);
 
 	bool sample_shading = s[FS].v->per_samp | key->sample_shading;