Seven new stable kernels

Greg Kroah-Hartman has announced the release of the 5.7.2, 5.6.18,5.4.46, 4.19.128, 4.14.184, 4.9.227, and 4.4.227 stable kernels. These containmitigations for the special register buffer datasampling (SRBDS) hardware vulnerability, as well as other fixeselsewhere in the trees. Users of those series should upgrade.