Ok on my Skylake/HD520 Latitude E7270. With Lilu v1.6.2, the SkylakeInjector kext that was previously published must be removed or system will hang at boot.
E7270_Clover_r5148_13.0.b3.zip
E7270_Clover_r5148_13.0.b3_v2.zip
Edit:
Revised pack v2 with KBL framebuffer changed to 0x59160000 and KBL fake id changed to 0x5916 to fix lack of HDMI output.
This fully supports 4K @24-30Hz out of HDMI and 4K @60Hz out of mDP:
Details about differences between KBL mobile framebuffers 0x56160000 ad 0x591B0000 and patching requirements are available here.