ARCv2: save ABI registers across signal handling
ARC: fix CONFIG_HARDENED_USERCOPY
ARC: build: remove non-existing bootpImage from KBUILD_IMAGE
ARC: build: add uImage.lzma to the top-level target
ARC: build: add uImage.lzma to the top-level target
ARC: build: add boot_targets to PHONY
ARC: build: remove unneeded extra-y
ARC: build: move symlink creation to arch/arc/Makefile to avoid race