[PATCHv2] support PMIC mc13892

[Arnaud Patard (Rtp)]

<b00984 at freescale.com> writes:

> From: Yong Shen <yong.shen at linaro.org>
>
> add support for mc13892, tested on mx51 babbage board

I've compared this version with mine, checked & tested it. I'm happy
with it and moreover it has the nice idea to work on my efikamx.

I'm not sure if it should be a signed-off-by: or acked-by: or reviewed-by:
tag since I wrote the code you've used a basis. I'm putting my s-o-b but
if I'm wrong, I do hope someone will correct it.

Signed-off-by: Arnaud Patard <arnaud.patard at rtp-net.org>