revert CONFIG_CC_HAVE_STACKPROTECTOR_SYSREG and
CONFIG_STACKPROTECTOR_PER_TASK which are disabled in previous commit by
mistake on aarch64

enable CONFIG_ARM64_LSE_ATOMICS on aarch64

remove CONFIG_BROKEN_GAS_INST=y on aarch64, not needed

next are default on aarch64 with this kernel version
CONFIG_CC_HAS_BRANCH_PROT_PAC_RET=y
CONFIG_CC_HAS_SIGN_RETURN_ADDRESS=y
CONFIG_AS_HAS_PAC=y