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

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

Change-Id: Ia92b778a5882d991b391dc29aeee0a5615677913
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48315
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/picasso/chip.c

@@ -55,7 +55,7 @@ const char *soc_acpi_name(const struct device *dev)
 	return NULL;
 };
 
-struct device_operations pci_domain_ops = {
+static struct device_operations pci_domain_ops = {
 	.read_resources	  = pci_domain_read_resources,
 	.set_resources	  = pci_domain_set_resources,
 	.scan_bus	  = pci_domain_scan_bus,

src/soc/amd/picasso/chip.h

@@ -223,6 +223,4 @@ struct soc_amd_picasso_config {
 
 typedef struct soc_amd_picasso_config config_t;
 
-extern struct device_operations pci_domain_ops;
-
 #endif /* __PICASSO_CHIP_H__ */