Revert "ARM: fiq_debugger: fix uninitialised spin_lock."

This reverts commit 9fe4c1e9170ecd9671ae08629f6c5578dd4e5d83.
Revert "ARM: fiq_debugger: lock between tty and console writes"

This reverts commit 104c1d72f8b812e873a528b67b8426e5f20250ec.
Revert "ARM: fiq_debugger: add process context reboot command"

This reverts commit 99439b475ff763ea2a6d8f8f08e42bb9e3d84bb7.
This is a Linux kernel 3.4.66 to 3.4.88 patch