The EMAC variant in the 405EX and 405EXr chips needs the "440EP" type clock
control workaround to avoid lockups of the Rx side during reset.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: NFelix Radensky <felix@embedded-sol.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>