Merge 4.19.159 into android-4.19-stable

Changes in 4.19.159
	powerpc/64s: move some exception handlers out of line
	powerpc/64s: flush L1D on kernel entry
	powerpc: Add a framework for user access tracking
	powerpc: Implement user_access_begin and friends
	powerpc: Fix __clear_user() with KUAP enabled
	powerpc/uaccess: Evaluate macro arguments once, before user access is allowed
	powerpc/64s: flush L1D after user accesses
	Revert "perf cs-etm: Move definition of 'traceid_list' global variable from header file"
	powerpc/8xx: Always fault when _PAGE_ACCESSED is not set
	Input: sunkbd - avoid use-after-free in teardown paths
	mac80211: always wind down STA state
	can: proc: can_remove_proc(): silence remove_proc_entry warning
	KVM: x86: clflushopt should be treated as a no-op by emulation
	ACPI: GED: fix -Wformat
	Linux 4.19.159

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Id5b2e80eb46200b260c8d9c4ce6601c23a63a59e