4.19-stable patches

4.19-stable patches

added patches:
	ptrace_Remove_unused_ptrace_may_access_sched()_and_MODE_IBRS.patch
	schedsmt_Expose_sched_smt_present_static_key.patch
	schedsmt_Make_sched_smt_present_track_topology.patch
	x86Kconfig_Select_SCHED_SMT_if_SMP_enabled.patch
	x86l1tf_Show_actual_SMT_state.patch
	x86process_Consolidate_and_simplify_switch_to_xtra()_code.patch
	x86retpoline_Make_CONFIG_RETPOLINE_depend_on_compiler_support.patch
	x86retpoline_Remove_minimal_retpoline_support.patch
	x86speculataion_Mark_command_line_parser_data___initdata.patch
	x86speculation_Add_RETPOLINE_AMD_support_to_the_inline_asm_CALL_NOSPEC_variant.patch
	x86speculation_Add_command_line_control_for_indirect_branch_speculation.patch
	x86speculation_Add_prctl()_control_for_indirect_branch_speculation.patch
	x86speculation_Add_seccomp_Spectre_v2_user_space_protection_mode.patch
	x86speculation_Apply_IBPB_more_strictly_to_avoid_cross-process_data_leak.patch
	x86speculation_Avoid___switch_to_xtra()_calls.patch
	x86speculation_Clean_up_spectre_v2_parse_cmdline().patch
	x86speculation_Disable_STIBP_when_enhanced_IBRS_is_in_use.patch
	x86speculation_Enable_cross-hyperthread_spectre_v2_STIBP_mitigation.patch
	x86speculation_Enable_prctl_mode_for_spectre_v2_user.patch
	x86speculation_Mark_string_arrays_const_correctly.patch
	x86speculation_Move_STIPBIBPB_string_conditionals_out_of_cpu_show_common().patch
	x86speculation_Prepare_arch_smt_update()_for_PRCTL_mode.patch
	x86speculation_Prepare_for_conditional_IBPB_in_switch_mm().patch
	x86speculation_Prepare_for_per_task_indirect_branch_speculation_control.patch
	x86speculation_Prevent_stale_SPEC_CTRL_msr_content.patch
	x86speculation_Propagate_information_about_RSB_filling_mitigation_to_sysfs.patch
	x86speculation_Provide_IBPB_always_command_line_options.patch
	x86speculation_Remove_unnecessary_ret_variable_in_cpu_show_common().patch
	x86speculation_Rename_SSBD_update_functions.patch
	x86speculation_Reorder_the_spec_v2_code.patch
	x86speculation_Reorganize_speculation_control_MSRs_update.patch
	x86speculation_Rework_SMT_state_change.patch
	x86speculation_Split_out_TIF_update.patch
	x86speculation_Unify_conditional_spectre_v2_print_functions.patch
	x86speculation_Update_the_TIF_SSBD_comment.patch