Replace DEVICE_NOOP with noop_(set|read)_resources

`.read_resources` and `.set_resources` are the only two device
operations that are considered mandatory. Other function pointers
can be left NULL. Having dedicated no-op implementations for the
two mandatory fields should stop the leaking of no-op pointers to
other fields.

Change-Id: I6469a7568dc24317c95e238749d878e798b0a362
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40207
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/amd/agesa/family14/northbridge.c b/src/northbridge/amd/agesa/family14/northbridge.c
index 85b3172..5826ee1 100644
--- a/src/northbridge/amd/agesa/family14/northbridge.c
+++ b/src/northbridge/amd/agesa/family14/northbridge.c
@@ -823,8 +823,8 @@
 };
 
 static struct device_operations cpu_bus_ops = {
-	.read_resources = DEVICE_NOOP,
-	.set_resources = DEVICE_NOOP,
+	.read_resources = noop_read_resources,
+	.set_resources = noop_set_resources,
 	.init = cpu_bus_init,
 	.scan_bus = cpu_bus_scan,
 };