[IA64] move XP and XPC to drivers/misc/sgi-xp

Move XPC and XPNET from arch/ia64/sn/kernel to drivers/misc/sgi-xp.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index bb94ce7..297a48f 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -360,4 +360,16 @@
 	  driver (SCSI/ATA) which supports enclosures
 	  or a SCSI enclosure device (SES) to use these services.
 
+config SGI_XP
+	tristate "Support communication between SGI SSIs"
+	depends on IA64_GENERIC || IA64_SGI_SN2
+	select IA64_UNCACHED_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+	select GENERIC_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+	---help---
+	  An SGI machine can be divided into multiple Single System
+	  Images which act independently of each other and have
+	  hardware based memory protection from the others.  Enabling
+	  this feature will allow for direct communication between SSIs
+	  based on a network adapter and DMA messaging.
+
 endif # MISC_DEVICES