Include "bl_common.h" in Xilinx zynqmp_private.h

Type "entry_point_info_t" is used in zynqmp_private.h. It is defined
in "bl_common.h". The header file which defines the type should be
included.
Signed-off-by: Wendy Liang <jliang@xilinx.com>

plat/xilinx/zynqmp/zynqmp_private.h

@@ -7,6 +7,7 @@
 #ifndef __ZYNQMP_PRIVATE_H__
 #define __ZYNQMP_PRIVATE_H__
 
+#include <bl_common.h>
 #include <interrupt_mgmt.h>
 
 void zynqmp_config_setup(void);