The kernel broke the name years ago, but didn't notice until it was much
too late. Rename the node to match expectations of userland software,
and what the kernel itself documents in its Kconfig help:
This provides a device that's usually called /dev/hwrng, ...
URL: https://marc.info/?l=linux-crypto-vger&m=144249767024990&w=2
Signed-off-by: Mike Frysinger <vapier@gentoo.org>