isaspec: Fix gpu_id for default_options

We forgot to set this.  It starts to matter in the next patch, otherwise
pre-pass to detect branch targets (needed for backwards jumps/branches)
will not work.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13300>

src/compiler/isaspec/decode.c

@@ -757,6 +757,7 @@ void
 isa_decode(void *bin, int sz, FILE *out, const struct isa_decode_options *options)
 {
 	const struct isa_decode_options default_options = {
+		.gpu_id = options ? options->gpu_id : 0,
 		.branch_labels = options ? options->branch_labels : false
 	};
 	struct decode_state *state;