net: dsa: mxl-gsw1xx: fix order in .remove operation

The driver's .remove operation was calling gswip_disable_switch() which
clears the GSWIP_MDIO_GLOB_ENABLE bit before calling
dsa_unregister_switch() and thereby violating a Golden Rule of driver
development to always unpublish userspace interfaces before disabling
hardware, as pointed out by Russell King.

Fix this by relying in GSWIP_MDIO_GLOB_ENABLE being cleared by the
.teardown operation introduced by the previous commit
("net: dsa: lantiq_gswip: fix teardown order").

Fixes: 2233593 ("net: dsa: add driver for MaxLinear GSW1xx switch family")
Suggested-by: "Russell King (Oracle)" <linux@armlinux.org.uk>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/63f882eeb910cf24503c35a443b541cc54a930f2.1765241054.git.daniel@makrotopia.org
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: dangowrt

drivers/net/dsa/lantiq/mxl-gsw1xx.c

@@ -652,8 +652,6 @@ static void gsw1xx_remove(struct mdio_device *mdiodev)
 	if (!priv)
 		return;
 
-	gswip_disable_switch(priv);
-
 	dsa_unregister_switch(priv->ds);
 }