4.19-stable patches

4.19-stable patches

added patches:
	arm64-add-cortex-x2-cpu-part-definition.patch
	arm64-add-id_aa64isar2_el1-sys-register.patch
	arm64-add-neoverse-n2-cortex-a710-cpu-part-definition.patch
	arm64-add-part-number-for-arm-cortex-a77.patch
	arm64-add-percpu-vectors-for-el1.patch
	arm64-entry-add-macro-for-reading-symbol-addresses-from-the-trampoline.patch
	arm64-entry-add-non-kpti-__bp_harden_el1_vectors-for-mitigations.patch
	arm64-entry-add-vectors-that-have-the-bhb-mitigation-sequences.patch
	arm64-entry-allow-the-trampoline-text-to-occupy-multiple-pages.patch
	arm64-entry-allow-tramp_alias-to-access-symbols-after-the-4k-boundary.patch
	arm64-entry-don-t-assume-tramp_vectors-is-the-start-of-the-vectors.patch
	arm64-entry-free-up-another-register-on-kpti-s-tramp_exit-path.patch
	arm64-entry-make-the-kpti-trampoline-s-kpti-sequence-optional.patch
	arm64-entry-make-the-trampoline-cleanup-optional.patch
	arm64-entry-move-the-trampoline-data-page-before-the-text-page.patch
	arm64-entry-move-trampoline-macros-out-of-ifdef-d-section.patch
	arm64-entry.s-add-ventry-overflow-sanity-checks.patch
	arm64-mitigate-spectre-style-branch-history-side-channels.patch
	arm64-proton-pack-report-spectre-bhb-vulnerabilities-as-part-of-spectre-v2.patch
	arm64-use-the-clearbhb-instruction-in-mitigations.patch
	kvm-arm64-add-templates-for-bhb-mitigation-sequences.patch
	kvm-arm64-allow-smccc_arch_workaround_3-to-be-discovered-and-migrated.patch