[openwrt/openwrt] realtek: dts: add LGS328C port 21 definition

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-25.12:
https://git.openwrt.org/2efc40b0ed481cb0cb404bb247f2162c174a3b87

commit 2efc40b0ed481cb0cb404bb247f2162c174a3b87
Author: Markus Stockhausen <markus.stockhausen at gmx.de>
AuthorDate: Fri Jan 30 18:16:02 2026 +0100

    realtek: dts: add LGS328C port 21 definition
    
    Port 21 definition was missed during addition of LGS328C.
    Add it to the dts.
    
    Fixes: 853d73f ("realtek: add support for Linksys LGS328C")
    Signed-off-by: Markus Stockhausen <markus.stockhausen at gmx.de>
    Link: https://github.com/openwrt/openwrt/pull/21793
    Signed-off-by: Robert Marko <robimarko at gmail.com>
    
    (cherry picked from commit 75fd2497acb25f77528c7aa73470f303a98f8b63)
    Link: https://github.com/openwrt/openwrt/pull/21900
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts b/target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts
index d4eeb5ce0a..12bfaa205b 100644
--- a/target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts
+++ b/target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts
@@ -215,6 +215,7 @@
 		SWITCH_PORT_SDS(17, 18, 3, usxgmii)
 		SWITCH_PORT_SDS(18, 19, 3, usxgmii)
 		SWITCH_PORT_SDS(19, 20, 3, usxgmii)
+		SWITCH_PORT_SDS(20, 21, 3, usxgmii)
 		SWITCH_PORT_SDS(21, 22, 3, usxgmii)
 		SWITCH_PORT_SDS(22, 23, 3, usxgmii)
 		SWITCH_PORT_SDS(23, 24, 3, usxgmii)