[openwrt/openwrt] ramips: add license to TP-Link MR6400 v4's DTS

[LEDE Commits]

adrian pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/4f4f6def0ecb299f0bafb0ece8c4979e0fca869e

commit 4f4f6def0ecb299f0bafb0ece8c4979e0fca869e
Author: Filip Moc <lede at moc6.cz>
AuthorDate: Tue Nov 24 22:27:44 2020 +0100

    ramips: add license to TP-Link MR6400 v4's DTS
    
    Signed-off-by: Filip Moc <lede at moc6.cz>
---
 target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts b/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts
index f0b87b5312..787abfad55 100644
--- a/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts
+++ b/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
 #include "mt7628an_tplink_8m.dtsi"
 
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