V4L/DVB (8453): sms1xxx: dvb/siano/: cleanups

This patch contains the following cleanups:
- mark smscore_module_init() as __init
- mark smscore_module_exit as __exit
- make the following needlessly global code static:
  - smscoreapi.c: struct g_smscore_notifyees
  - smscoreapi.c: struct g_smscore_devices
  - smscoreapi.c: struct g_smscore_deviceslock
  - smscoreapi.c: struct g_smscore_registry
  - smscoreapi.c: struct g_smscore_registrylock
  - smscoreapi.c: smscore_module_init()
  - smscoreapi.c: smscore_module_exit()
  - smsdvb.c: struct g_smsdvb_clients
  - smsdvb.c: struct g_smsdvb_clientslock

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>