[POWERPC] Support setting affinity for U3/U4 MSI sources

Hook up affinity-setting for U3/U4 MSI interrupt sources.

Tested on Quad G5 with myri10ge.

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/sysdev/mpic_u3msi.c b/arch/powerpc/sysdev/mpic_u3msi.c
index 305b864..0fc4e96 100644
--- a/arch/powerpc/sysdev/mpic_u3msi.c
+++ b/arch/powerpc/sysdev/mpic_u3msi.c
@@ -40,6 +40,7 @@
 	.unmask		= mpic_u3msi_unmask_irq,
 	.eoi		= mpic_end_irq,
 	.set_type	= mpic_set_irq_type,
+	.set_affinity	= mpic_set_affinity,
 	.typename	= "MPIC-U3MSI",
 };