bitops: Add a count trailing zeros function.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
console: Update posix and example code to latest API

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
regdump: Introduce simple symbolic register dump routines.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>