radeonsi: move sid.h/r600d_common.h to a common place.

Step one to merging radv would be to move some files around.

This only adds the include path to r600/radeonsi, because later
we want to avoid having to add it to the generic target paths.

Acked-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
diff --git a/configure.ac b/configure.ac
index 75b1de4..a413a3a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2670,6 +2670,7 @@
 dnl Substitute the config
 AC_CONFIG_FILES([Makefile
 		src/Makefile
+		src/amd/Makefile
 		src/compiler/Makefile
 		src/egl/Makefile
 		src/egl/main/egl.pc