net: dsa: qca8k: remove assignment of an_enabled in pcs_get_state()

pcs_get_state() implementations are not supposed to alter an_enabled.
Remove this assignment.

Fixes: b3591c2 ("net: dsa: qca8k: Switch to PHYLINK instead of PHYLIB")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1pdsE5-00Dl2l-8F@rmk-PC.armlinux.org.uk
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: Russell King (Oracle)

drivers/net/dsa/qca/qca8k-8xxx.c

@@ -1483,7 +1483,6 @@ static void qca8k_pcs_get_state(struct phylink_pcs *pcs,
 
 	state->link = !!(reg & QCA8K_PORT_STATUS_LINK_UP);
 	state->an_complete = state->link;
-	state->an_enabled = !!(reg & QCA8K_PORT_STATUS_LINK_AUTO);
 	state->duplex = (reg & QCA8K_PORT_STATUS_DUPLEX) ? DUPLEX_FULL :
 							   DUPLEX_HALF;