MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the touchscreen drivers.  Along with this, some
DRV_VERSION macros were removed as they are also pointless.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>