p5: enable in-line kernel building

Change-Id: I0b7929266b4c7f770a8f2301315c2677fd3a4711
p5: use Samsung's ril

Change-Id: Iba00feb71f7bf88f947401879f0dc334ef06aec9
Reference: http://forum.xda-developers.com/showpost.php?p=44864858&postcount=95
p5: remove custom apn list and use CyanogenMod's one

Change-Id: I54feb3d40100e9df71efdd9f42ed0abe544369e9