V4L/DVB (13683): sanio-ms: clean up init, exit and id_table

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Make module_init static and mark it with __init.
Make module_exit static and mark it with __exit.
Mark probe functions with __devinit.
Make id table static and mark with __devinitconst.

This will eliminate the following sparse warnings (see "make C=1"):
 * smsdvb.c:668:5: warning: symbol 'smsdvb_module_init' was not declared. Should it be static?
 * smsdvb.c:682:6: warning: symbol 'smsdvb_module_exit' was not declared. Should it be static?
 * smsusb.c:491:22: warning: symbol 'smsusb_id_table' was not declared. Should it be static?
 * smsusb.c:567:5: warning: symbol 'smsusb_module_init' was not declared. Should it be static?
 * smsusb.c:578:6: warning: symbol 'smsusb_module_exit' was not declared. Should it be static?
 * smssdio.c:341:5: warning: symbol 'smssdio_module_init' was not declared. Should it be static?
 * smssdio.c:353:6: warning: symbol 'smssdio_module_exit' was not declared. Should it be static?

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>