net: dsa: microchip: bypass dev_ops for mirror operations

net: dsa: microchip: bypass dev_ops for mirror operations

Mirror operations are handled through a common function that redirects
the treatment to ksz_dev_ops callbacks. This layer of indirection isn't
needed since we now have a dsa_switch_ops for each switch family.

Remove this indirection layer for KSZ switches, by connecting the
ksz_dev_ops :: mirror_add() and mirror_del() operations directly to
dsa_switch_ops.
Remove the now unused mirror callbacks from ksz_dev_ops.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Bastien Curutchet (Schneider Electric) <bastien.curutchet@bootlin.com>
Link: https://patch.msgid.link/20260512-clean-ksz-2nd-series-v1-6-c00f6ce037fa@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>