mb/ocp/deltalake: Rename motherboard_fill_fadt()

Rename motherboard_fill_fadt() to the common override
mainboard_fill_fadt() function to override FADT.

Tested=On OCP Delta Lake, verify FADT PM Profile is set to
Enterprise Server.

Signed-off-by: Jingle Hsu <jingle_hsu@wiwynn.com>
Change-Id: Ie9ea7cc6e712d0aca57bbeac1a4154921d123be4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46836
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/ocp/deltalake/fadt.c

@@ -3,7 +3,7 @@
 #include <acpi/acpi.h>
 #include <soc/acpi.h>
 
-void motherboard_fill_fadt(acpi_fadt_t *fadt)
+void mainboard_fill_fadt(acpi_fadt_t *fadt)
 {
 	fadt->preferred_pm_profile = PM_ENTERPRISE_SERVER;
 }

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

@@ -20,7 +20,6 @@ typedef struct {
 unsigned long northbridge_write_acpi_tables(const struct device *device,
 	unsigned long current, struct acpi_rsdp *rsdp);
 
-void motherboard_fill_fadt(acpi_fadt_t *fadt);
 
 int calculate_power(int tdp, int p1_ratio, int ratio);
 void uncore_inject_dsdt(const struct device *device);