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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I746b04e1e36abaf2ff3852beb8a04535692442c1
diff --git a/meta-phosphor/recipes-devtools/iotools/iotools_1.6.bb b/meta-phosphor/recipes-devtools/iotools/iotools_1.6.bb
index e08859c..54303fa 100644
--- a/meta-phosphor/recipes-devtools/iotools/iotools_1.6.bb
+++ b/meta-phosphor/recipes-devtools/iotools/iotools_1.6.bb
@@ -1,6 +1,6 @@
 DESCRIPTION = "Command line tools for hardware device registers"
 HOMEPAGE = "https://github.com/jonmayergoogle/iotools"
-LICENSE = "GPLv2"
+LICENSE = "GPL-2.0-or-later"
 LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
 SRCREV = "8d928b3360246b8ead95b442ca3887ce8b8f942f"
 SRC_URI = "git://git@github.com/jonmayergoogle/iotools.git;protocol=https;branch=master"