{cpu,soc}: Use DEVICE_NOOP macro over dummy symbol

Change-Id: Iaf2b2873bd1c52d7f936bd9b483e194a0872a626
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7285
Tested-by: build bot (Jenkins)
Reviewed-by: Bruce Griffith <Bruce.Griffith@se-eng.com>
diff --git a/src/soc/nvidia/tegra124/soc.c b/src/soc/nvidia/tegra124/soc.c
index 11a52c4..8ad1aa9 100644
--- a/src/soc/nvidia/tegra124/soc.c
+++ b/src/soc/nvidia/tegra124/soc.c
@@ -45,13 +45,9 @@
 	printk(BIOS_INFO, "CPU: Tegra124\n");
 }
 
-static void soc_noop(device_t dev)
-{
-}
-
 static struct device_operations soc_ops = {
-	.read_resources   = soc_noop,
-	.set_resources    = soc_noop,
+	.read_resources   = DEVICE_NOOP,
+	.set_resources    = DEVICE_NOOP,
 	.enable_resources = soc_enable,
 	.init             = soc_init,
 	.scan_bus         = 0,