net: phy: micrel: Fix default LED behaviour

By default the LED will be ON when there is a link but they are not
blinking when there is any traffic activity. Therefore change this
to blink when there is any traffic.

Fixes: 5a774b64 ("net: phy: micrel: Add support for lan8842")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://patch.msgid.link/20250922130314.758229-1-horatiu.vultur@microchip.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>