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/include/common/ptdev.h

@@ -7,8 +7,8 @@
 #ifndef PTDEV_H
 #define PTDEV_H
 #include <list.h>
-#include <x86/lib/spinlock.h>
-#include <x86/timer.h>
+#include <asm/lib/spinlock.h>
+#include <asm/timer.h>
 
 
 enum intx_ctlr {