[6/6] net: bcmgenet: reduce severity of missing clock warnings

[6/6] net: bcmgenet: reduce severity of missing clock warnings

Origin: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit?id=ae200c26b32b98f48a9eb5cf53396fd15d94a3cb
Bug-Debian: https://bugs.debian.org/950578

If one types "failed to get enet clock" or similar into google
there are ~370k hits. The vast majority are people debugging
problems unrelated to this adapter, or bragging about their
rpi's. Further, the DT clock bindings here are optional.

Given that its not a fatal situation with common DT based
systems, lets reduce the severity so people aren't seeing failure
messages in everyday operation.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Gbp-Pq: Topic features/all/bcmgenet
Gbp-Pq: Name 0006-net-bcmgenet-reduce-severity-of-missing-clock-warnin.patch