[yocto] fitImage kernel compression type

[Pierluigi Greto]

Hello everyone,

I'm building an fitImage and I would like to set the kernel compression 
type. Yocto is automatically creating the linux.bin but I cannot find 
any variable to specify the kernel compression type. I would like to 
have a gzip compressed kernel. Is possible to specify the compression 
type by using a variable? If not, there are other ways?

Thank you,
Pierluigi