hv:cleanup header file for vm.c & vm.h

-- now hypervisor.h is the universal set of header file,
   this patch doesn't include hypervisor.h, only include
   some necessary header files for vm.c and vm.h
-- move 'struct vcpuid_entry' from vm.h to vcpuid.h
-- remove dead code 'enum vm_privilege_level'
-- move 'enum vpic_wire_mode' from vm.h to vpic.h

Tracked-On: #1842
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/arch/x86/guest/vm.c

@@ -4,12 +4,21 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <hypervisor.h>
-#include <bsp_extern.h>
-#include <multiboot.h>
+#include <types.h>
+#include <errno.h>
+#include <sprintf.h>
+#include <vm.h>
+#include <bits.h>
 #include <e820.h>
+#include <multiboot.h>
 #include <vtd.h>
 #include <reloc.h>
+#include <ept.h>
+#include <guest_pm.h>
+#include <console.h>
+#include <ptdev.h>
+#include <vmcs.h>
+#include <logmsg.h>
 
 vm_sw_loader_t vm_sw_loader;