sgi-xp: only build for ia64-sn2 when CONFIG_IA64_GENERIC specified

For the time being build for ia64-sn2 alone when CONFIG_IA64_GENERIC is
specified.

This eliminates a dependency of the XP/XPC drivers on having the GRU
driver insmod'd in order to insmod them, when running on an ia64-sn2
system.

On such a system the GRU driver serves no useful purpose.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
index 46325fc..e8d5cfb 100644
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -1104,7 +1104,7 @@
 
 	if (is_shub())
 		xpc_exit_sn2();
-	else
+	else if (is_uv())
 		xpc_exit_uv();
 }
 
@@ -1363,7 +1363,7 @@
 out_1:
 	if (is_shub())
 		xpc_exit_sn2();
-	else
+	else if (is_uv())
 		xpc_exit_uv();
 	return ret;
 }