generic: import rtl8261n patches from mediatek

RTL8261N is used on some Airoha and Realtek devices. Move the driver
from Mediatek to generic so it can be used everywhere.

Signed-off-by: Andrew LaMarche <andrewjlamarche@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/18163
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/generic/hack-6.6/735-net-phy-realtek-rtl8261n.patch

@@ -0,0 +1,21 @@
+--- a/drivers/net/phy/Kconfig
++++ b/drivers/net/phy/Kconfig
+@@ -406,6 +406,8 @@ config QSEMI_PHY
+ 
+ source "drivers/net/phy/realtek/Kconfig"
+ 
++source "drivers/net/phy/rtl8261n/Kconfig"
++
+ config RENESAS_PHY
+ 	tristate "Renesas PHYs"
+ 	help
+--- a/drivers/net/phy/Makefile
++++ b/drivers/net/phy/Makefile
+@@ -100,6 +100,7 @@ obj-$(CONFIG_NXP_TJA11XX_PHY)	+= nxp-tja
+ obj-y				+= qcom/
+ obj-$(CONFIG_QSEMI_PHY)		+= qsemi.o
+ obj-$(CONFIG_REALTEK_PHY)	+= realtek/
++obj-y				+= rtl8261n/
+ obj-$(CONFIG_RENESAS_PHY)	+= uPD60620.o
+ obj-$(CONFIG_ROCKCHIP_PHY)	+= rockchip.o
+ obj-$(CONFIG_SMSC_PHY)		+= smsc.o