Fix the types for the start, end, and count arguments to

arm_gic_fdt_alloc_resource. These were the old u_long where they should be
rman_res_t. Both of these are the same size on arm64 so this is just for
correctness, and would not have led to incorrect behaviour.

Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation

sys/arm64/arm64/gic_fdt.c

@@ -198,7 +198,7 @@ arm_gic_fdt_attach(device_t dev)
 
 static struct resource *
 arm_gic_fdt_alloc_resource(device_t bus, device_t child, int type, int *rid,
-    u_long start, u_long end, u_long count, u_int flags)
+    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
 {
 	struct arm_gic_fdt_softc *sc = device_get_softc(bus);
 	struct gic_devinfo *di;