[IA64-SGI] fix prom revision checks in SN kernel

The following patch fixes two spots in the SN kernel
that check a fixed prom revision number to determine prom
feature support. These checks are only valid on shub1 systems.
They are invalid on shub2 systems which have a different prom
with different revision numbers.
Signed-off-by: Aaron Young <ayoung@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/sn/kernel/setup.c

@@ -458,7 +458,7 @@ void __init sn_setup(char **cmdline_p)
 	 * support here so we don't have to listen to failed keyboard probe
 	 * messages.
 	 */
-	if (version <= 0x0209 && acpi_kbd_controller_present) {
+	if (is_shub1() && version <= 0x0209 && acpi_kbd_controller_present) {
 		printk(KERN_INFO "Disabling legacy keyboard support as prom "
 		       "is too old and doesn't provide FADT\n");
 		acpi_kbd_controller_present = 0;

arch/ia64/sn/pci/tioca_provider.c

@@ -595,7 +595,7 @@ tioca_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 
 	/* sanity check prom rev */
 
-	if (sn_sal_rev() < 0x0406) {
+	if (is_shub1() && sn_sal_rev() < 0x0406) {
 		printk
 		    (KERN_ERR "%s:  SGI prom rev 4.06 or greater required "
 		     "for tioca support\n", __FUNCTION__);