hvc_console: Add __init and __exit to hvc_vio

Trivial patch which adds the __init/__exit macros to the module_init/
module_exit functions of char/hvc_vio.c

Please have a look at the small patch and either pull it through
your tree, or please ack' it so Jiri can pull it through the trivial tree.

linux version 2.6.31-rc6 - linus git tree, Do 20. Aug 22:26:06 CEST 2009

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>