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>

src/soc/amd/stoneyridge/chip.c

@@ -95,7 +95,7 @@ const char *soc_acpi_name(const struct device *dev)
 	}
 };
 
-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,

src/soc/amd/stoneyridge/chip.h

@@ -68,6 +68,4 @@ struct soc_amd_stoneyridge_config {
 
 typedef struct soc_amd_stoneyridge_config config_t;
 
-extern struct device_operations pci_domain_ops;
-
 #endif /* __STONEYRIDGE_CHIP_H__ */