pan/bi: Print flow control on instructions

This helps debug the flow control lowering passes on Valhall.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16804>

src/panfrost/bifrost/bi_printer.c.py

@@ -180,6 +180,9 @@ bi_print_instr(const bi_instr *I, FILE *fp)
     if (I->table)
         fprintf(fp, ".table%u", I->table);
 
+    if (I->flow)
+        fprintf(fp, ".flow%u", I->flow);
+
     if (I->op == BI_OPCODE_COLLECT_I32) {
         for (unsigned i = 0; i < I->nr_srcs; ++i) {
             if (i > 0)