The adaptive spin patches introduced an overdesigned optimization for
the adaptive path. This avoidance of those code pathes is not worth
the extra conditionals and furthermore it is inconsistent in itself.

Remove it and use the same mechanism as the other lock pathes. That
way we have a consistent state manipulation scheme and less extra
cases.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>