freedreno/a6xx: Only set emit.hs/ds when we're drawing patches

At least the gallium blitter helper will call us to draw with
tessellation shaders set but a non-patch primitive.

Signed-off-by: Kristian H. Kristensen <hoegsberg@google.com>

Reviewed-by: Rob Clark <robdclark@gmail.com>

src/gallium/drivers/freedreno/a6xx/fd6_draw.c

@@ -129,8 +129,6 @@ fd6_draw_vbo(struct fd_context *ctx, const struct pipe_draw_info *info,
 		.info = info,
 		.key = {
 			.vs = ctx->prog.vs,
-			.hs = ctx->prog.hs,
-			.ds = ctx->prog.ds,
 			.gs = ctx->prog.gs,
 			.fs = ctx->prog.fs,
 			.key = {
@@ -158,6 +156,9 @@ fd6_draw_vbo(struct fd_context *ctx, const struct pipe_draw_info *info,
 	};
 
 	if (info->mode == PIPE_PRIM_PATCHES) {
+		emit.key.hs = ctx->prog.hs;
+		emit.key.ds = ctx->prog.ds;
+
 		shader_info *ds_info = &emit.key.ds->nir->info;
 		switch (ds_info->tess.primitive_mode) {
 		case GL_ISOLINES: