freedreno/ir3: fix wrong local_primitive_id_start type

When changing the patch to use an offset instead of a bool, the type was
accidentally left as bool.

Fixes: f472c9844309 ("freedreno/ir3: add support for a650 tess shared storage")

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5765>
diff --git a/src/freedreno/ir3/ir3_nir_lower_tess.c b/src/freedreno/ir3/ir3_nir_lower_tess.c
index e084f99..730b550 100644
--- a/src/freedreno/ir3/ir3_nir_lower_tess.c
+++ b/src/freedreno/ir3/ir3_nir_lower_tess.c
@@ -44,7 +44,7 @@
 	struct exec_list emit_outputs;
 
 	/* tess ctrl shader on a650 gets the local primitive id at different bits: */
-	bool local_primitive_id_start;
+	unsigned local_primitive_id_start;
 };
 
 static nir_ssa_def *