powerpc: add PPC_FEATURE userspace bits for SCV and DARN instructions

[Michael Ellerman]

On Sat, 2017-05-20 at 04:29:49 UTC, Nicholas Piggin wrote:
> Providing "scv" support to userspace requires kernel support, so it
> must be advertised as independently to the base ISA 3 instruction set.
> 
> The darn instruction relies on firmware enablement, so it has been
> decided to split this out from the core ISA 3 feature as well.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
> Acked-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/a4700a26107241cc7b9ac8528b2c67

cheers