hv: mod: do not use explicit arch name when including headers

Instead of "#include <x86/foo.h>", use "#include <asm/foo.h>".

In other words, we are adopting the same practice in Linux kernel.

Tracked-On: #5920
Signed-off-by: Liang Yi <yi.liang@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>

hypervisor/dm/vrtc.c

@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <x86/guest/vm.h>
-#include <x86/io.h>
+#include <asm/guest/vm.h>
+#include <asm/io.h>
 
 #define CMOS_ADDR_PORT		0x70U
 #define CMOS_DATA_PORT		0x71U