sources/layers.txt: Add meta-efikamx to supported layers
sources/layers.txt: Add meta-efikamx to supported layers

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>
Signed-off-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@dominion.thruhere.net>

wwright2/angstrom-setup.methode,Angstrom-distribution/setup-scripts,Ambertec/setup-scripts