[][Fix mt7981 uart2_1 function name type]

[Description]
Fix mt7981 uart2_1 function name type.
Change "uart2_0" to "uart2_1".

[Release-log]
N/A

Change-Id: I7c7a3421cc9cb3671e418a1a1d8110b157de81b8
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5210011
1 file changed