jf: add magic samsung kernel cmdline

* from GPE ML4
* left out maxcpus=2 (caused boot crashes)

Change-Id: I7679264de7185440c71f9588766c3d25b9d6db6c
Merge "jf: add magic samsung kernel cmdline" into cm-11.0
Merge remote-tracking branch 'cm/cm-11.0' into kitkat