Revert "Inline ldrex/strex for thumb2, remove ARMv5 remnants."

This reverts commit 62980e817c51c56208971ed5c3e98e0cb21e1685.
Implement corrected sysinit (init.d) system (1/2)

This loads the init.d scripts before the Android services are
started allowing the use of the functions Mounts2SD provides.

Change-Id: I2cdaf491b3d65e6c803c223e419f574370e366a4