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-bsp/images/npcm7xx-bootblock_10.10.17.bb b/meta-nuvoton/recipes-bsp/images/npcm7xx-bootblock_10.10.17.bb
index 7e1912d..21ae615 100644
--- a/meta-nuvoton/recipes-bsp/images/npcm7xx-bootblock_10.10.17.bb
+++ b/meta-nuvoton/recipes-bsp/images/npcm7xx-bootblock_10.10.17.bb
@@ -1,7 +1,7 @@
 SUMMARY = "Primary bootloader for NPCM7XX (Poleg) devices"
 DESCRIPTION = "Primary bootloader for NPCM7XX (Poleg) devices"
 HOMEPAGE = "https://github.com/Nuvoton-Israel/npcm7xx-bootblock"
-LICENSE = "GPLv2"
+LICENSE = "GPL-2.0-only"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=b234ee4d69f5fce4486a80fdaf4a4263"
 
 FILENAME = "Poleg_bootblock_${PV}.bin"