vl: remove unnecessary duplicate call to tpm_cleanup

tpm_cleanup is called from main() and also registered with atexit from
tpm_init.  The function only visits the tpm_backends linked list, and the
atexit registration happens right after tpm_init fills in the list from
-tpmdev options.  Therefore, the direct call is unnecessary.  Remove it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

vl.c

@@ -4620,9 +4620,6 @@ int main(int argc, char **argv, char **envp)
     bdrv_close_all();
     pause_all_vcpus();
     res_free();
-#ifdef CONFIG_TPM
-    tpm_cleanup();
-#endif
 
     /* vhost-user must be cleaned up before chardevs.  */
     net_cleanup();