We don't need this anymore.  The IRQs are now properly mapped through the
DT.
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NRichard Zhu <r65037@freescale.com>