Make ralink compile again.

Add std.ralink to define common things across all ralink configs.
Add cpu, machine and options INTRNG to this file.
Remove RT1310.hints file reference: that file isn't in our tree.

sys/arm/conf/RT1310

@@ -8,7 +8,7 @@
 
 ident		RT1310
 include 	"std.arm"
-hints		"RT1310.hints"
+include 	"../ralink/std.ralink"
 
 # Flattened Device Tree
 options 	FDT

sys/arm/ralink/rt1310_intc.c

@@ -140,7 +140,7 @@ rt1310_intc_probe(device_t dev)
 	if (!ofw_bus_status_okay(dev))
 		return (ENXIO);
 
-	if (!ofw_bus_is_compatible(dev, "rt,pic"))
+	if (!ofw_bus_is_compatible_strict(dev, "rt,pic"))
 		return (ENXIO);
 
 #ifdef INTRNG

sys/arm/ralink/std.ralink

@@ -0,0 +1,5 @@
+# $FreeBSD$
+files		"../ralink/files.ralink"
+cpu		CPU_ARM9
+machine 	arm
+options		INTRNG