package/systemd: set vconsole support option to default y

package/systemd: set vconsole support option to default y

Without support for vconsole, systemd will abruptly kill anything
spawned on the console, thus preventing users from loging in from
the console, effectively locking them out if the target does not
have another mean of logging in (no sshd, no serial line...)

We fix that by making support for vconsole default to y, since
logging in from the console if more frequent than not. Users can
still de-activate it when they know they don't need it.

Note that logging from a serial line is not impacted, and still
works whether vconsole is enabled or not.

Signed-off-by: David Fogle <david.j.fogle@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>