Moved global ether_clk variable into controller data structure.
Patch from David Brownell.

Davicom 9161 PHY was being incorrectly displayed as "9196".
Patch from Brian Stafford.

clk_get() doesn't return NULL on error, so the return value needs to be
tested with IS_ERR().

Whitespace cleanup.
Signed-off-by: NAndrew Victor <andrew@sanpeople.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>