bitops: add fls

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

lib: generic bitops.h

Factored out common bitops stuff, just like Linux's
include/linux/bitops.h.

Signed-off-by: Peter Feiner <pfeiner@google.com>
Message-Id: <1456938657-20850-3-git-send-email-pfe

lib: generic bitops.h

Factored out common bitops stuff, just like Linux's
include/linux/bitops.h.

Signed-off-by: Peter Feiner <pfeiner@google.com>
Message-Id: <1456938657-20850-3-git-send-email-pfeiner@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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