vc: move translation out of do_con_write

Now that we reordered the code and the label, we can eliminate the
translation into a separate function. We call it vc_translate here.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200615074910.19267-16-jslaby@suse.cz


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>