powerpc/boot: don't force gzipped uImage

This patch modifies the generation of uImage by handing over
the selected compression type instead of forcing gzip

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-06-14 10:16:23 +00:00 • committed by Michael Ellerman
commit fbded57c96