soc/amd/stoneyridge/chip.h: remove unneeded extern pci_domain_ops

Now pci_domain_ops in chip.c can also be marked as static.

Change-Id: I5e481fe311c9db4aacfd94bbf671edf679528946
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48318
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/soc/amd/stoneyridge/chip.c b/src/soc/amd/stoneyridge/chip.c
index 909b847..e8bc71a 100644
--- a/src/soc/amd/stoneyridge/chip.c
+++ b/src/soc/amd/stoneyridge/chip.c
@@ -95,7 +95,7 @@
 	}
 };
 
-struct device_operations pci_domain_ops = {
+static struct device_operations pci_domain_ops = {
 	.read_resources	  = domain_read_resources,
 	.set_resources	  = pci_domain_set_resources,
 	.enable_resources = domain_enable_resources,