Add new setting CONFIG_NET_DSA_REALTEK_RTL8366RB_LEDS which
was introduced in kernel 6.12 and allows enabling LEDs for
the Realtek RTL8366RB subdriver.
Signed-off-by: Mathew McBride <matt@traverse.com.au>
Link: https://github.com/openwrt/openwrt/pull/18654
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>