'VIRTIO_CONSOLE' depends on 'TTY', so need to select 'TTY' explicitly
before selecting 'VIRTIO_CONSOLE'.

Otherwise randconfig can generate a config file which enables
'VIRTIO_CONSOLE' but has 'TTY' disabled.
Signed-off-by: NChen Gang <gang.chen@asianux.com>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>