linux-kexecboot: use kernel_conf_variable like linux.inc does and respect CMDLINE_DEBUG
linux-kexecboot: use kernel_conf_variable like linux.inc does and respect CMDLINE_DEBUG

Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>

bluelightning/meta-handheld,bluelightning/meta-handheld