pan/decode: Dump unknown2

Looks to be 0.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5219>
diff --git a/src/panfrost/pandecode/decode.c b/src/panfrost/pandecode/decode.c
index 7dc19d0..02f320c 100644
--- a/src/panfrost/pandecode/decode.c
+++ b/src/panfrost/pandecode/decode.c
@@ -2613,6 +2613,9 @@
                                        MALI_GET_ALPHA_COVERAGE(inverted_coverage));
                 }
 
+                if (s->unknown2_2)
+                        pandecode_prop(".unknown2_2 = %X", s->unknown2_2);
+
                 if (s->unknown2_3 || s->unknown2_4) {
                         pandecode_log(".unknown2_3 = ");