[U-BOOT][KERNEL][SRCREV] Add override with <recipe name>-rk
This has been done to maintain the backwards compatibility with our CI/CD: in the previous version of Clea OS (based on Kirkston), the recipes of U-Boot and kernel had the name u-boot-seco-rk and linux-seco-rk, respectively, and our CI/CD uses these names for the integration layer task.
Now it is possibile to use -rk as override for both U-Boot and kernel (see the SRCREV.conf file).
Also the PROVIDES list has been updated for the same reason. In this way old mechanisms can refers to those recipes in the same way as in the past.
Note: in the future, the new material will refer to them without the -rk suffix (only with the new name).
Signed-off-by: Davide Cardillo davide.cardillo@seco.com