svn commit: r240135 - in head/sys: amd64/conf conf dev/random i386/conf modules/random

[Arthur Mesh]

Funny, I've also implemented RdRand backing for /dev/random over the
weekend, w/o being aware of kib@'s work. Oh well.

One comment I have: IVY_RNG is potentially not the best name. RdRand
will be available on future architectures, such as Haswell. 

Perhaps RDRAND_RNG would make a better name?

Thanks.