pan/bi: Paste over bi_has_arg

While we're at it, cleanup the Midgard one.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4150>
diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index 1c01b2d..cd0d4f5 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -474,6 +474,7 @@
 bool bi_has_outmod(bi_instruction *ins);
 bool bi_has_source_mods(bi_instruction *ins);
 bool bi_is_src_swizzled(bi_instruction *ins, unsigned s);
+bool bi_has_arg(bi_instruction *ins, unsigned arg);
 
 /* BIR passes */