Bridge ASIC is widely used in different SGI systems, but the connected
chipset is either HUB, HEART or BEDROCK. This commit switches to
irq domain hierarchy for hub and bridge interrupts to get bridge
setup out of hub interrupt code.
Signed-off-by: NThomas Bogendoerfer <tbogendoerfer@suse.de>
[paul.burton@mips.com:
  Resolve conflict with commit 69a07a41 ("MIPS: SGI-IP27: rework HUB
  interrupts").]
Signed-off-by: NPaul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org