In previous life qdev_init_nofail() used to call hw_error() which
did register dump and other scary things.  Now it calls
error_report() and does a regular exit(1).  Fix the comment
to match reality.
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>