4.19-stable patches

4.19-stable patches

added patches:
	intel_idle-disable-ibrs-during-long-idle.patch
	kvm-vmx-fix-ibrs-handling-after-vmexit.patch
	kvm-vmx-prevent-guest-rsb-poisoning-attacks-with-eibrs.patch
	revert-x86-cpu-add-a-steppings-field-to-struct-x86_cpu_id.patch
	revert-x86-speculation-add-rsb-vm-exit-protections.patch
	x86-bugs-add-amd-retbleed-boot-parameter.patch
	x86-bugs-add-cannon-lake-to-retbleed-affected-cpu-list.patch
	x86-bugs-keep-a-per-cpu-ia32_spec_ctrl-value.patch
	x86-bugs-optimize-spec_ctrl-msr-writes.patch
	x86-bugs-report-amd-retbleed-vulnerability.patch
	x86-bugs-report-intel-retbleed-vulnerability.patch
	x86-bugs-split-spectre_v2_select_mitigation-and-spectre_v2_user_select_mitigation.patch
	x86-bugs-warn-when-ibrs-mitigation-is-selected-on-enhanced-ibrs-parts.patch
	x86-common-stamp-out-the-stepping-madness.patch
	x86-cpu-add-a-steppings-field-to-struct-x86_cpu_id.patch
	x86-cpu-add-consistent-cpu-match-macros.patch
	x86-cpu-amd-enumerate-btc_no.patch
	x86-cpufeature-add-facility-to-check-for-min-microcode-revisions.patch
	x86-cpufeature-fix-various-quality-problems-in-the-asm-cpu_device_hd.h-header.patch
	x86-cpufeatures-move-retpoline-flags-to-word-11.patch
	x86-devicetable-move-x86-specific-macro-out-of-generic-code.patch
	x86-entry-add-kernel-ibrs-implementation.patch
	x86-entry-remove-skip_r11rcx.patch
	x86-speculation-add-rsb-vm-exit-protections.patch
	x86-speculation-add-spectre_v2-ibrs-option-to-support-kernel-ibrs.patch
	x86-speculation-change-fill_return_buffer-to-work-with-objtool.patch
	x86-speculation-disable-rrsba-behavior.patch
	x86-speculation-fill-rsb-on-vmexit-for-ibrs.patch
	x86-speculation-fix-firmware-entry-spec_ctrl-handling.patch
	x86-speculation-fix-rsb-filling-with-config_retpoline-n.patch
	x86-speculation-fix-spec_ctrl-write-on-smt-state-change.patch
	x86-speculation-remove-x86_spec_ctrl_mask.patch
	x86-speculation-use-cached-host-spec_ctrl-value-for-guest-entry-exit.patch
	x86-speculation-use-declare_per_cpu-for-x86_spec_ctrl_current.patch