dm: replace UUID with vmname.

The UUID has several usages before:
1, For HV to identify the static VM configuration of post-launched VM.
2, Seed virtualization.
3, Slightly prevent launching malicous VM from SOS as lack of secure
boot.

The UUID is confused to user, user don't understand what it is. And user
don't know where to get/apply the UUID. The worst experience is user
can't launch any VMs w/o re-compile the hv. Everything needs to be
static decided in building phase.

Now we decide to remove UUID and split each usage. For 1st usage, use
vmname as the identifier of static VM configuration. For 2nd one, we
will use --vseed as the new parameter. For 3rd one, will pretect by
SOS's dm-verity.

This patch will remove the UUID parameter and support 1st&3rd usages
from DM part. For 2nd usage, another patch will be submitted later.

Tracked-On: #6685
Signed-off-by: Yuanyuan Zhao <yuanyuan.zhao@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>

devicemodel/include/dm.h

@@ -32,11 +32,9 @@
 #include <stdbool.h>
 #include "types.h"
 #include "dm_string.h"
-
-#define MAX_VMNAME_LEN	128U
+#include "acrn_common.h"
 
 struct vmctx;
-extern char *guest_uuid_str;
 extern uint8_t trusty_enabled;
 extern char *vsbl_file_name;
 extern char *ovmf_file_name;