From 1d47ddf7c3725e889763b1fffa70a04e1061940b Mon Sep 17 00:00:00 2001
From: Wang Dongsheng <dongsheng.wang@freescale.com>
Date: Tue, 17 Dec 2013 16:17:01 +0800
Subject: [PATCH] powerpc/85xx: add hardware automatically enter pw20 state

Using hardware features make core automatically enter PW20 state.
Set a TB count to hardware, the effective count begins when PW10
is entered. When the effective period has expired, the core will
proceed from PW10 to PW20 if no exit conditions have occurred during
the period.

Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
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