xilinx_timer: Removed include of qemu-timer

The Xilinx timer does not interact with the qemu_timer API, so dont include it.
Signed-off-by: NPeter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

hw/xilinx_timer.c

@@ -23,7 +23,6 @@
  */
 
 #include "sysbus.h"
-#include "qemu-timer.h"
 #include "ptimer.h"
 
 #define D(x)