I just wanted to know if the asrock h110m-dgs (http://www.asrock.com/mb/Intel/H110M-DGS/) is compatible with the i5 6600k without doing anything with the bios
Yes, you can use the i5 660k in the H110 MB, but keep in mind you can't oc the k version cpu.
You may consider to get i5 6500 + H110, or i5 7500 + B250/H270 too.