These board support packages are all contained within the meta-intel BSP collection.
https://www.yoctoproject.org/software-overview/layers/bsps/thud-261-cascade-lake/
https://www.yoctoproject.org/software-overview/layers/bsps/sumo-251-halo/
https://www.yoctoproject.org/software-overview/layers/bsps/sumo-25-coffee-lake/
https://www.yoctoproject.org/software-overview/layers/bsps/sumo-25-harcuvar/
https://www.yoctoproject.org/software-overview/layers/bsps/sumo-251-saddle-brook-sky-lake/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-bay-trail-valley-island/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-xeon/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-halo/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-cherry-hill/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-saddle-brook-skylake/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-camelback-mountain-broadwell-de/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-grantley-r/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-walnut-canyon-2-broadwell/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-walnut-canyon-haswell/
https://www.yoctoproject.org/software-overview/layers/bsps/rocko-24-mohon-peak/
https://www.yoctoproject.org/bsps/pyro23-xeon/
https://www.yoctoproject.org/bsps/pyro23-halo/
https://www.yoctoproject.org/bsps/morty22-halo/
https://www.yoctoproject.org/bsps/krogoth21-cherry-hill/
https://www.yoctoproject.org/bsps/krogoth21-saddle-brook-skylake/
https://www.yoctoproject.org/bsps/krogoth21-camelback-mountain-broadwell/
https://www.yoctoproject.org/bsps/krogoth21-grantley/
https://www.yoctoproject.org/bsps/krogoth21-riverforest/
https://www.yoctoproject.org/bsps/jethro20-cherry-hill/
https://www.yoctoproject.org/bsps/jethro20-walnut-canyon-2-broadwell/
https://www.yoctoproject.org/bsps/jethro20-saddle-brook-skylake/
https://www.yoctoproject.org/bsps/jethro20-camelback-mountain-broadwell/
https://www.yoctoproject.org/bsps/jethro20-grantley/
https://www.yoctoproject.org/bsps/jethro20-riverforest/
https://www.yoctoproject.org/bsps/jethro20-valleyisland/
https://www.yoctoproject.org/bsps/fido18-cherryhill-braswell/
https://www.yoctoproject.org/bsps/fido18-walnut-canyon2-broadwell/
https://www.yoctoproject.org/bsps/fido18-grantley/
https://www.yoctoproject.org/bsps/fido18-jasperforest/
https://www.yoctoproject.org/bsps/fido18-riverforest/
https://www.yoctoproject.org/bsps/fido18-sugarbay/
https://www.yoctoproject.org/bsps/dizzy172-haswell-walnut-canyon/
https://www.yoctoproject.org/bsps/dizzy17-crown-bay/
https://www.yoctoproject.org/bsps/dizzy172-crystal-forest/
https://www.yoctoproject.org/bsps/dizzy17-emenlow/
https://www.yoctoproject.org/bsps/dizzy17-fish-river-island/
https://www.yoctoproject.org/bsps/dizzy172-highland-forest/
https://www.yoctoproject.org/bsps/dizzy17-jasper-forest/
https://www.yoctoproject.org/bsps/dizzy17-sugar-bay/
https://www.yoctoproject.org/bsps/dizzy172-valley-island/
https://www.yoctoproject.org/bsps/dizzy17-valley-island/
https://www.yoctoproject.org/bsps/daisy161-crown-bay/
https://www.yoctoproject.org/bsps/daisy161-crown-bay0/
https://www.yoctoproject.org/bsps/daisy161-crystal-forest/
https://www.yoctoproject.org/bsps/daisy161-emenlow/
https://www.yoctoproject.org/bsps/daisy161-emenlow0/
https://www.yoctoproject.org/bsps/daisy161-fish-river-island2/
https://www.yoctoproject.org/bsps/daisy161-fish-river-island20/
https://www.yoctoproject.org/bsps/daisy162-haswell/
https://www.yoctoproject.org/bsps/daisy161-haswell/
https://www.yoctoproject.org/bsps/daisy161-jasper-forest/
https://www.yoctoproject.org/bsps/daisy161-mohon-peak/
https://www.yoctoproject.org/bsps/daisy161-romley/
https://www.yoctoproject.org/bsps/daisy161-sugar-bay/
https://www.yoctoproject.org/bsps/daisy162-valley-island-64bit/