acm: Add recipe for Haswell ACM.
packagegroup-tboot: Add HSW ACM to tboot packagegroup.
measured-image-bootimg: Add HSW ACM to boot configs.
measured-image-bootimg: Remove SNB ACM from syslinux.cfg.
acm: Remove SNB spcific ACM recipe.

The IVB ACM supports both SNB and IVB. Has for a long time actually.