XAA support was removed from xorg xserver
http://cgit.freedesktop.org/xorg/xserver/commit/?id=e191e296e6e7861978ea4a0ae9aa7b780e52732b

Signed-off-by: Bernd Kuhls <berndkuhls@hotmail.com>

diff -uNr xf86-video-ati-6.14.6.org/configure.ac xf86-video-ati-6.14.6/configure.ac
--- xf86-video-ati-6.14.6.org/configure.ac	2012-06-29 15:46:11.000000000 +0200
+++ xf86-video-ati-6.14.6/configure.ac	2014-03-29 17:21:35.805208243 +0100
@@ -163,8 +163,6 @@
 AM_CONDITIONAL(DRM_MODE, test x$DRM_MODE = xyes)
 AM_CONDITIONAL(LIBUDEV, test x$LIBUDEV = xyes)
 
-AC_DEFINE(USE_XAA, 1, [Build support for XAA])
-
 # Properly handle EXA.
 AC_MSG_CHECKING([whether to enable EXA support])
 if test "x$EXA" = xyes; then
