bsps/zynqmp: Use correct include path

The existing include path only works from inside the RTEMS build. This
fixes the include path to work both in the RTEMS build and with builds
of external apps since this file gets installed with the BSP.

bsps/aarch64/xilinx-zynqmp/include/bsp/jffs2_xqspipsu.h

@@ -36,7 +36,7 @@
 #ifndef LIBBSP_XILINX_ZYNQMP_JFFS2_XQSPIPSU_H
 #define LIBBSP_XILINX_ZYNQMP_JFFS2_XQSPIPSU_H
 
-#include "xqspipsu.h"
+#include <dev/spi/xqspipsu.h>
 
 #ifdef __cplusplus
 extern "C" {