qtserialbus: use correct license

Change-Id: I2dcc3588c6676946cfa3d7344c10be6378e780c0
Reviewed-by: Teemu Holappa <teemu.holappa@theqtcompany.com>

recipes-qt/qt5/qtserialbus_git.bb

@@ -23,7 +23,7 @@
 require recipes-qt/qt5/qt5.inc
 require recipes-qt/qt5/qt5-git.inc
 
-LICENSE = "GFDL-1.3 & (LGPL-3.0 | GPL-3.0 | GPL-2.1)"
+LICENSE = "GFDL-1.3 & (LGPL-3.0 | GPL-3.0 | GPL-2.0)"
 LIC_FILES_CHKSUM = " \
     file://LICENSE.LGPLv3;md5=b8c75190712063cde04e1f41b6fdad98 \
     file://LICENSE.GPLv2;md5=05832301944453ec79e40ba3c3cfceec \