tests: build_all: led: update for new lp50xx driver

Add nodes for all new devices supported by the updated lp50xx driver to
get these enabled as part of the build test.

Based on initial work from:
  - Marek Janus <marek.janus@grinn-global.com>
  - Rico Ganahl <rico.ganahl@bytesatwork.ch>

Signed-off-by: Mathieu Anquetin <mathieu.anquetin@groupe-cahors.com>