vmdk: Fix %d and %lld to PRI* in format strings

Signed-off-by: Fam Zheng <famz@redhat.com>
scsi-disk: Improve error messager if can't get version number

More often it is that bdrv_ioctl fails due to not supported by driver or
whatever reason, in this case we should be specific, because "interface
too old" is very confusing.

Signed-off-by: Fam Zheng <famz@redhat.com>