meta-phosphor: phosphor-ipmi-fru: fix LICENSE warning

Bitbake currently gives an `obsolute-license` warning for any
of the recipes using `phosphor-ipmi-fru.inc`.  Fix this by switching
the LICENSE variable to `GPL-3.0-or-later`, which matches the contents
of the LICENSE file in the repository.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ife34a6bfaf564b530a889a3fa277ed84c0f2a640
diff --git a/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru.inc b/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru.inc
index 6246095..e6ba676 100644
--- a/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru.inc
+++ b/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru.inc
@@ -1,5 +1,5 @@
 HOMEPAGE = "https://github.com/openbmc/ipmi-fru-parser"
-LICENSE = "GPL-3.0"
+LICENSE = "GPL-3.0-or-later"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=7702f203b58979ebbc31bfaeb44f219c"
 SRC_URI += "git://github.com/openbmc/ipmi-fru-parser;branch=master;protocol=https"
 SRCREV = "cf2dee3476a7e26ab99b50efe87155cc50432a9c"