ci: Add dtc dependencies for rawhide
ci: Add dtc dependencies for rawhide

Both F28 and Rawhide build their own dtc version. Rawhide was missing
the required build deps.

Signed-off-by: Joel Stanley <4816dabf8db1bc6cac35b3a24cab2ff844b5b0c7@jms.id.au>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.ibm.com>

shenki/skiboot,legoater/skiboot,open-power/skiboot,legoater/skiboot,shenki/skiboot,stewart-ibm/skiboot,legoater/skiboot,qemu/skiboot,open-power/skiboot,shenki/skiboot,open-power/skiboot,qemu/skiboot,shenki/skiboot,legoater/skiboot,stewart-ibm/skiboot,open-power/skiboot,qemu/skiboot,legoater/skiboot,shenki/skiboot,qemu/skiboot,open-power/skiboot,qemu/skiboot,stewart-ibm/skiboot