igvm: move igvm.h file to include/system

Prepare for arch-specific igvm code being added to the code base.

Reviewed-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Luigi Leonardi <leonardi@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-ID: <20251029105555.2492276-2-kraxel@redhat.com>

backends/igvm-cfg.c

@@ -12,7 +12,7 @@
 #include "qemu/osdep.h"
 
 #include "system/igvm-cfg.h"
-#include "igvm.h"
+#include "system/igvm.h"
 #include "qom/object_interfaces.h"
 
 static char *get_igvm(Object *obj, Error **errp)

backends/igvm.c

@@ -11,8 +11,8 @@
 
 #include "qemu/osdep.h"
 
-#include "igvm.h"
 #include "qapi/error.h"
+#include "system/igvm.h"
 #include "system/memory.h"
 #include "system/address-spaces.h"
 #include "hw/core/cpu.h"