[PATCH] ia64: generic kernel support for sn2

I _think_ I got this one right (at least, it booted on hw).  It should
allow generic kernels to include the sn2 code.

arch/ia64/Makefile

@@ -66,7 +66,8 @@ core-$(CONFIG_IA64_SGI_SN2)	+= arch/ia64/sn/
 drivers-$(CONFIG_PCI)		+= arch/ia64/pci/
 drivers-$(CONFIG_IA64_HP_SIM)	+= arch/ia64/hp/sim/
 drivers-$(CONFIG_IA64_HP_ZX1)	+= arch/ia64/hp/common/ arch/ia64/hp/zx1/
-drivers-$(CONFIG_IA64_GENERIC)	+= arch/ia64/hp/common/ arch/ia64/hp/zx1/ arch/ia64/hp/sim/
+drivers-$(CONFIG_IA64_GENERIC)	+= arch/ia64/hp/common/ arch/ia64/hp/zx1/ arch/ia64/hp/sim/ \
+				   arch/ia64/sn/
 
 boot := arch/ia64/boot
 

arch/ia64/sn/kernel/machvec.c

@@ -31,4 +31,5 @@
  */
 
 #define MACHVEC_PLATFORM_NAME	sn2
+#define MACHVEC_PLATFORM_HEADER	<asm/machvec_sn2.h>
 #include <asm/machvec_init.h>