4.4-stable patches

4.4-stable patches

added patches:
	kvm-s390-wire-up-bpb-feature.patch
	s390-add-automatic-detection-of-the-spectre-defense.patch
	s390-add-optimized-array_index_mask_nospec.patch
	s390-add-options-to-change-branch-prediction-behaviour-for-the-kernel.patch
	s390-add-sysfs-attributes-for-spectre.patch
	s390-alternative-use-a-copy-of-the-facility-bit-mask.patch
	s390-correct-module-section-names-for-expoline-code-revert.patch
	s390-correct-nospec-auto-detection-init-order.patch
	s390-do-not-bypass-bpenter-for-interrupt-system-calls.patch
	s390-enable-cpu-alternatives-unconditionally.patch
	s390-entry.s-fix-spurious-zeroing-of-r0.patch
	s390-introduce-cpu-alternatives.patch
	s390-introduce-execute-trampolines-for-branches.patch
	s390-move-nobp-parameter-functions-to-nospec-branch.c.patch
	s390-replace-is_enabled-expoline_-with-is_enabled-config_expoline_.patch
	s390-report-spectre-mitigation-via-syslog.patch
	s390-run-user-space-and-kvm-guests-with-modified-branch-prediction.patch
	s390-scrub-registers-on-kernel-entry-and-kvm-exit.patch