northbridge: DEVICE_NOOP some stub function callbacks

Reduces loc and makes NOP's explicit.

Change-Id: I8a117b150b8b421c7a18b48a2ac36d15679f20b0
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7344
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/northbridge/amd/agesa/family14/northbridge.c b/src/northbridge/amd/agesa/family14/northbridge.c
index 57502e9..8384c98 100644
--- a/src/northbridge/amd/agesa/family14/northbridge.c
+++ b/src/northbridge/amd/agesa/family14/northbridge.c
@@ -779,15 +779,7 @@
 
 /* Bus related code */
 
-static void cpu_bus_read_resources(device_t dev)
-{
-}
-
-static void cpu_bus_set_resources(device_t dev)
-{
-}
-
-static u32 cpu_bus_scan(device_t dev, u32 max)
+static u32 cpu_bus_scan(struct device *dev, u32 max)
 {
 	struct bus *cpu_bus = dev->link_list;
 	device_t cpu;
@@ -846,8 +838,8 @@
 };
 
 static struct device_operations cpu_bus_ops = {
-	.read_resources = cpu_bus_read_resources,
-	.set_resources = cpu_bus_set_resources,
+	.read_resources = DEVICE_NOOP,
+	.set_resources = DEVICE_NOOP,
 	.enable_resources = NULL,
 	.init = cpu_bus_init,
 	.scan_bus = cpu_bus_scan,