rng-tools: use 'hw-rng' to disable libjitterentropy

The warrior version of rng-tools introduced an optional PACKAGECONFIG,
which was enabled by default, called `libjitterentropy`.  For BMC chips
which have a hardware RNG, this is not a necessary feature, and causes
a noticeable delay in the start of the rngd.  On systems with very low
IO activity we are seeing cases of what appears to be hangs.

Define a machine feature which can be used to disable the PACKAGECONFIG
for machines which contain a BMC chip with a hardware RNG.  Aspeed has
one which is supported; Nuvoton currently does not.

(From meta-phosphor rev: e60e3098c981ece700a855ddc0daf2bdddf0a7da)

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ie4a26e6ca22fe0d7ee9470062f5b26ac733454f2
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>

0 files changed, 0 insertions, 0 deletions