rootfsinstall: rpi: allow update of running kernel

src/rootfsinstall.sh

@@ -612,6 +612,9 @@ dtparam=audio=on" > $BOOTMP/config.txt
    #   vlls directory: Additional GPU code, e.g. extra codecs. 
    #                   Not present in the initial release.
 
+   echo "protect_running_kernel=False" >> $ROOTMP/etc/dnf/dnf.conf
+   sed -i "s|installonly_limit=.*|installonly_limit=1|" $ROOTMP/etc/dnf/dnf.conf
+
    [ "$SWHOME" -a "${SWHOME:0:4}" = "/tmp" ] && rm -rf $SWHOME
 
 elif [ "$TARGETDEVICE" = "cubox" ]; then