smdk4412-camera: improve thread handling and video snapshot support

Change-Id: I5ed5ecea12d880de75300bf359e1ff0227068d01
Improve boot speed

 * Start with noop, finish with ROW.

Change-Id: Id27997e61978dbe9111a3526d6ccb08dd4cc9587
start kernel debug earlier

Change-Id: I1a8e9735f5a8b4c9f038d05a40b15cf86bc47091
clean layout

Change-Id: If58d50b2e95745dbbd272539014f5df693a1b515