MIPS: SNI: Convert to new irq_chip functions

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2206/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --cc arch/mips/sni/a20r.c
Simple merge

diff --cc arch/mips/sni/pcimt.c
Simple merge

diff --cc arch/mips/sni/pcit.c
Simple merge

diff --cc arch/mips/sni/rm200.c
Simple merge