MIPS: Netlogic: NAND IRQ mapping

Add NAND IRQ mapping for XLP9xx processor.

Signed-off-by: Subhendu Sekhar Behera <sbehera@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10820/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>