V4L/DVB (10748): sms1xxx: restore smsusb_driver.name to smsusb

The sms1xxx driver will be broken down into smaller modules,
so the original name, smsusb, is more appropriate.

Signed-off-by: Uri Shkolnik <uris@siano-ms.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>