[IA64-SGI] SGI Altix cross partition functionality [2/3]

This patch contains the communication module (XPC) for cross partition
communication on a partitioned SGI Altix.
Signed-off-by: NDean Nelson <dcn@sgi.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

arch/ia64/sn/kernel/Makefile

@@ -13,3 +13,5 @@ obj-$(CONFIG_IA64_GENERIC)      += machvec.o
 obj-$(CONFIG_SGI_TIOCX)		+= tiocx.o
 obj-$(CONFIG_IA64_SGI_SN_XP)	+= xp.o
 xp-y				:= xp_main.o xp_nofault.o
+obj-$(CONFIG_IA64_SGI_SN_XP)	+= xpc.o
+xpc-y				:= xpc_main.o xpc_channel.o xpc_partition.o