soc/intel/xeon_sp/skx: Prepare acpi.* for merging

Clean up acpi.h in preparation for merging with cpx/ acpi.* files

Change-Id: I2a0dc964eeb7f8da53676eb94c4385ff8668f6af
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45218
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Jay Talbott <JayTalbott@sysproconsulting.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/xeon_sp/skx/acpi.c

@@ -82,7 +82,7 @@ unsigned long acpi_fill_mcfg(unsigned long current)
 	return current;
 }
 
-unsigned long acpi_madt_irq_overrides(unsigned long current)
+static unsigned long acpi_madt_irq_overrides(unsigned long current)
 {
 	int sci = acpi_sci_irq();
 	uint16_t flags = MP_IRQ_TRIGGER_LEVEL;
@@ -747,7 +747,7 @@ unsigned long northbridge_write_acpi_tables(const struct device *device,
 	return current;
 }
 
-void uncore_inject_dsdt(void)
+static void uncore_inject_dsdt(void)
 {
 	size_t hob_size;
 	const uint8_t uds_guid[16] = FSP_HOB_IIO_UNIVERSAL_DATA_GUID;

src/soc/intel/xeon_sp/skx/include/soc/acpi.h

@@ -11,10 +11,9 @@ typedef struct {
 	uint8_t   buf[32];
 } MEM_BLK;
 
-void acpi_create_serialio_ssdt(acpi_header_t *ssdt);
-unsigned long acpi_madt_irq_overrides(unsigned long current);
 unsigned long northbridge_write_acpi_tables(const struct device *device,
 	unsigned long current, struct acpi_rsdp *rsdp);
-void uncore_inject_dsdt(void);
+
+void motherboard_fill_fadt(acpi_fadt_t *fadt);
 
 #endif /* _SOC_ACPI_H_ */