Fix for fsl_upm

[Kumar Gala]

On Oct 27, 2011, at 9:18 AM, Rusev wrote:

> patch is vs. 2.6.39, yet it applied to 3.1
> 
> 
> 
> Fix of UPM driver for Freescale PowerPC processors
> 
> If Freescale LBC driver fails to initialise itself from device tree,
> then internal structure is freed only but not NULL-fied.
> As result functions fsl_lbc_find() after checking the structure is not NULL are
> trying to access device registers.
> 
> Signed-off-by: Alexandre Rusev <arusev at dev.rtsoft.ru> 

applied to next

- k