HV: further cleanup of header inclusions

According to the comments in hypervisor:
 " This file includes config header file "bsp_cfg.h" and other
	hypervisor used header files.
	It should be included in all the source files."

this patch includes all common header files in hypervisor.h
then removes other redundant inclusions

Signed-off-by: Zide Chen <zide.chen@intel.com>

hypervisor/arch/x86/debug/reboot.c

@@ -2,7 +2,7 @@
  * Copyright (C) <2018> Intel Corporation
  * SPDX-License-Identifier: BSD-3-Clause
  */
-#include <acrn_common.h>
+#include <hypervisor.h>
 
 int warm_reboot(void)
 {