Staging: dt3155: don't use default init_module/cleanup_module function names

Fromy: Randy Dunlap <randy.dunlap@oracle.com>

Fix the dt3155 driver to use module_init()/module_exit() instead of
default init_module() and cleanup_module() function names.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Scott Smedley <ss@aao.gov.au>
Cc: Marek Lindner <lindner_marek@yahoo.de>
Cc: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>