[PATCH v2] arm/ls1021a: Add Sleep feature for ls1021

[Wang Dongsheng]

> > > > Add system STANDBY implement for ls1021 platform.
> > > >
> > > > Signed-off-by: Chenhui Zhao <chenhui.zhao at freescale.com>
> > > > Signed-off-by: Wang Dongsheng <dongsheng.wang at freescale.com>
> > > > ---
> > > > *v2*:
> > > > - Remove PSCI code. Just implement STANDBY in platform code.
> > >
> > > Why stepping back?  We are encouraged to move to PSCI, aren't we?
> > >
> >
> > As Lorenzo said, PSCI v1.0 support will be in kernel v4.4. So I remove
> > psci for this patch.
> 
> v4.4 is not far away, and we should probably wait instead of pushing
> the code that needs to be revised quite soon.
> 

Ok, thanks for your review.

Regards,
-Dongsheng