pan/bi: Use new packing

...and remove the old manual code.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6749>
diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index 6f0578a..b207a9d 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -145,8 +145,9 @@
 
 struct bi_block;
 
+/* Sync with gen-pack.py */
 enum bi_cond {
-        BI_COND_ALWAYS,
+        BI_COND_ALWAYS = 0,
         BI_COND_LT,
         BI_COND_LE,
         BI_COND_GE,