freedreno/ir3: fix sam argument order comment

Signed-off-by: Rob Clark <robclark@freedesktop.org>

src/gallium/drivers/freedreno/ir3/ir3_compiler.c

@@ -1392,8 +1392,8 @@ fill_tex_info(struct ir3_compile_context *ctx,
 	/*
 	 * lay out the first argument in the proper order:
 	 *  - actual coordinates first
-	 *  - array index
 	 *  - shadow reference
+	 *  - array index
 	 *  - projection w
 	 *
 	 * bias/lod go into the second arg