Someone already prepared support for aarch64, I guess there won't be an official armv7 build for the rpi3.
Until some of the developers have the hardware themselves and have setup a repository and a build server you would have to build it yourself or use the images that you use currently.

Am Sonntag, 13. März 2016 20:29:43 UTC+1 schrieb marcin kowalski:

I tested the r-pi2 image today with rpi3,and after manually updating the firmware files on sd card (except for kernel7.img), i got void to boot correctly on r-pi3. Otherwise i would be stuck on rainbow screen.

Official images are a bit outdated and only support r-pi2. Afaik there is already a raspberry pi firmware package in void repo that provides the necessary files. A simple arm image rebuild would resolve this problem.