[POWERPC] iSeries: fix viopath initialisation

/proc/iSeries/config should only be created if we are running on legacy
iSeries.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/iseries/viopath.c

@@ -42,6 +42,7 @@
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/prom.h>
+#include <asm/firmware.h>
 #include <asm/iseries/hv_types.h>
 #include <asm/iseries/hv_lp_event.h>
 #include <asm/iseries/hv_lp_config.h>
@@ -183,6 +184,9 @@ static int __init vio_proc_init(void)
 {
 	struct proc_dir_entry *e;
 
+	if (!firmware_has_feature(FW_FEATURE_ISERIES))
+		return 0;
+
 	e = create_proc_entry("iSeries/config", 0, NULL);
 	if (e)
 		e->proc_fops = &proc_viopath_operations;