4.20-stable patches

4.20-stable patches

added patches:
	arm64-dts-allwinner-a64-fix-usb-otg-regulator.patch
	cpu-hotplug-fix-smt-disabled-by-bios-detection-for-kvm.patch
	dmaengine-bcm2835-fix-abort-of-transactions.patch
	dmaengine-bcm2835-fix-interrupt-race-on-rt.patch
	dmaengine-imx-dma-fix-wrong-callback-invoke.patch
	futex-handle-early-deadlock-return-correctly.patch
	irqchip-gic-v3-its-plug-allocation-race-for-devices-sharing-a-devid.patch
	kvm-fix-kvm_ioctl_create_device-reference-counting-cve-2019-6974.patch
	kvm-nvmx-unconditionally-cancel-preemption-timer-in-free_nested-cve-2019-7221.patch
	kvm-x86-work-around-leak-of-uninitialized-stack-contents-cve-2019-7222.patch
	perf-core-don-t-warn-for-impossible-ring-buffer-sizes.patch
	perf-tests-evsel-tp-sched-fix-bitwise-operator.patch
	perf-x86-intel-delay-memory-deallocation-until-x86_pmu_dead_cpu.patch
	perf-x86-intel-uncore-add-node-id-mask.patch
	scsi-aic94xx-fix-module-loading.patch
	scsi-cxlflash-prevent-deadlock-when-adapter-probe-fails.patch
	scsi-sd_zbc-fix-zone-information-messages.patch
	serial-8250_pci-make-pci-class-test-non-fatal.patch
	serial-fix-race-between-flush_to_ldisc-and-tty_open.patch
	serial-sh-sci-do-not-free-irqs-that-have-already-been-freed.patch
	staging-speakup-fix-tty-operation-null-derefs.patch
	usb-dwc3-gadget-handle-0-xfer-length-for-out-ep.patch
	usb-gadget-musb-fix-short-isoc-packets-with-inventra-dma.patch
	usb-gadget-udc-net2272-fix-bitwise-and-boolean-operations.patch
	usb-phy-am335x-fix-race-condition-in-_probe.patch
	x86-mce-initialize-mce.bank-in-the-case-of-a-fatal-error-in-mce_no_way_out.patch