treewide: fix GPLv2/LGPLv2.1 obsolete-license warnings

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I746b04e1e36abaf2ff3852beb8a04535692442c1
diff --git a/meta-nuvoton/recipes-kernel/linux/linux-nuvoton.inc b/meta-nuvoton/recipes-kernel/linux/linux-nuvoton.inc
index 585a154..13e68e5 100644
--- a/meta-nuvoton/recipes-kernel/linux/linux-nuvoton.inc
+++ b/meta-nuvoton/recipes-kernel/linux/linux-nuvoton.inc
@@ -1,6 +1,6 @@
 DESCRIPTION = "Linux kernel for Nuvoton NPCM7xx"
 SECTION = "kernel"
-LICENSE = "GPLv2"
+LICENSE = "GPL-2.0-only"
 
 PROVIDES += "virtual/kernel"