Commit e69525: "kernel: Build uImage only when really
needed" hardcoded target kernel image to zImage for
case if uImage is generated by OpenEmbedded buildsystem.
However not all kernel architectures support zImage
target, for example AArch64 doesn't, so building of
kernel is failing on this step.
So instead of building zImage target that may not
exist for many architectures, build vmlinux target
that exists for all architectures.
Since kernel-uboot.bbclass uses vmlinux anyway for
creating image, there is no side effect on this change.
Signed-off-by: Ruslan Bilovol <rbilovol@cisco.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
