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/bir.c b/src/panfrost/bifrost/bir.c
index 0f1efcb..5fe0ae4 100644
--- a/src/panfrost/bifrost/bir.c
+++ b/src/panfrost/bifrost/bir.c
@@ -60,3 +60,17 @@
 
         return classy && small && first;
 }
+
+bool
+bi_has_arg(bi_instruction *ins, unsigned arg)
+{
+        if (!ins)
+                return false;
+
+        bi_foreach_src(ins, s) {
+                if (ins->src[s] == arg)
+                        return true;
+        }
+
+        return false;
+}
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 */