use stock kernel

Change-Id: Ic6c06d738e82ad7c31049ba3d0bfa25ff553810d

and remove SamsungServiceMode
Change-Id: Ic6c06d738e82ad7c31049ba3d0bfa25ff553810d

Change-Id: Ic6c06d738e82ad7c31049ba3d0bfa25ff553810d

switched to SlimRoms widevine
Change-Id: Ic6c06d738e82ad7c31049ba3d0bfa25ff553810d
Merge "use stock kernel" into jb4.2