e1000e: Fix e1000_check_for_copper_link_ich8lan return value.

e1000e: Fix e1000_check_for_copper_link_ich8lan return value.

e1000e_check_for_copper_link() and e1000_check_for_copper_link_ich8lan()
are the two functions that may be assigned to mac.ops.check_for_link when
phy.media_type == e1000_media_type_copper. Commit 19110cfbb34d ("e1000e:
Separate signaling for link check/link up") changed the meaning of the
return value of check_for_link for copper media but only adjusted the first
function. This patch adjusts the second function likewise.

Reported-by: Christian Hesse <[email protected]>
Reported-by: Gabriel C <[email protected]>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=198047
Fixes: 19110cfbb34d ("e1000e: Separate signaling for link check/link up")
Signed-off-by: Benjamin Poirier <[email protected]>
Tested-by: Aaron Brown <[email protected]>
Tested-by: Christian Hesse <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>