The mpc83xx variant uses a shared IRQ for all channels, so the individual
channel nodes don't have an interrupt property. Fix the code to print the
controller IRQ instead if there isn't any for the channel.
Acked-by: NTimur Tabi <timur@freescale.com>
Acked-by: NLi Yang <leoli@freescale.com>
Signed-off-by: NPeter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>