powerpc/powernv: Make opal log only readable by root

[Michael Ellerman]

On Wed, 2019-02-27 at 03:02:29 UTC, Jordan Niethe wrote:
> Currently the opal log is globally readable. It is kernel policy to limit
> the visibility of physical addresses / kernel pointers to root.
> Given this and the fact the opal log may contain this information it would
> be better to limit the readability to root.
> 
> Signed-off-by: Jordan Niethe <jniethe5 at gmail.com>
> Reviewed-by: Stewart Smith <stewart at linux.ibm.com>
> Reviewed-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/7b62f9bd2246b7d3d086e571397c14ba

cheers