soc/amd/picasso/chip: make soc_acpi_name static

This function isn't used outside of the same compilation unit.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I332046341bc7a5a499355f2147296e8c09d7e0ce
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50817
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/picasso/chip.c

@@ -25,7 +25,7 @@ struct device_operations cpu_bus_ops = {
 	.acpi_fill_ssdt   = generate_cpu_entries,
 };
 
-const char *soc_acpi_name(const struct device *dev)
+static const char *soc_acpi_name(const struct device *dev)
 {
 	if (dev->path.type == DEVICE_PATH_DOMAIN)
 		return "PCI0";

src/soc/amd/picasso/include/soc/acpi.h

@@ -11,6 +11,4 @@
 uintptr_t agesa_write_acpi_tables(const struct device *device, uintptr_t current,
 				  acpi_rsdp_t *rsdp);
 
-const char *soc_acpi_name(const struct device *dev);
-
 #endif /* AMD_PICASSO_ACPI_H */