0a5d8d5f85
Commit d06dca38bb (linux: cleanup kconfig fixup processing) introduced
the conditional LINUX_KCONFIG_FIXUP_CMDS_ROOTFS_CPIO, using a negative
logic condition.
Switch that to use positive logic.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>