soc/intel: remove duplicate weak versions of mainboard_get_dram_part_num()

Consolidate all weak declarations of mainboard_get_dram_part_num() to
instead use the common definition in lib/spd_bin.c.

BUG=b:168724473
TEST="emerge-volteer coreboot && emerge-nocturne coreboot &&
emerge-dedede coreboot" and verify build succeeds without error.

Change-Id: I322899c080ab7ebcf1cdcad3ce3dfa1d022864d1
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45890
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/lib/spd_bin.c

@@ -2,6 +2,7 @@
 
 #include <cbfs.h>
 #include <console/console.h>
+#include <memory_info.h>
 #include <spd_bin.h>
 #include <string.h>
 #include <device/dram/ddr3.h>
@@ -17,6 +18,12 @@ void dump_spd_info(struct spd_block *blk)
 		}
 }
 
+const char * __weak mainboard_get_dram_part_num(void)
+{
+	/* Default weak implementation, no need to override part number. */
+	return NULL;
+}
+
 static bool use_ddr4_params(int dram_type)
 {
 	switch (dram_type) {

src/soc/intel/alderlake/romstage/romstage.c

@@ -21,12 +21,6 @@
 	0x8d, 0x09, 0x11, 0xcf, 0x8b, 0x9f, 0x03, 0x23	\
 }
 
-const char * __weak mainboard_get_dram_part_num(void)
-{
-	/* Default weak implementation, no need to override part number. */
-	return NULL;
-}
-
 /* Save the DIMM information for SMBIOS table 17 */
 static void save_dimm_info(void)
 {

src/soc/intel/cannonlake/romstage/romstage.c

@@ -23,12 +23,6 @@
 	0x8d, 0x09, 0x11, 0xcf, 0x8b, 0x9f, 0x03, 0x23	\
 }
 
-const char * __weak mainboard_get_dram_part_num(void)
-{
-	/* Default weak implementation, no need to override part number. */
-	return NULL;
-}
-
 /* Save the DIMM information for SMBIOS table 17 */
 static void save_dimm_info(void)
 {

src/soc/intel/elkhartlake/romstage/romstage.c

@@ -21,12 +21,6 @@
 	0x8d, 0x09, 0x11, 0xcf, 0x8b, 0x9f, 0x03, 0x23	\
 }
 
-const char * __weak mainboard_get_dram_part_num(void)
-{
-	/* Default implementation, no need to override part number. */
-	return NULL;
-}
-
 /* Save the DIMM information for SMBIOS table 17 */
 static void save_dimm_info(void)
 {

src/soc/intel/jasperlake/romstage/romstage.c

@@ -21,12 +21,6 @@
 	0x8d, 0x09, 0x11, 0xcf, 0x8b, 0x9f, 0x03, 0x23	\
 }
 
-const char * __weak mainboard_get_dram_part_num(void)
-{
-	/* Default weak implementation, no need to override part number. */
-	return NULL;
-}
-
 /* Save the DIMM information for SMBIOS table 17 */
 static void save_dimm_info(void)
 {

src/soc/intel/tigerlake/romstage/romstage.c

@@ -21,12 +21,6 @@
 	0x8d, 0x09, 0x11, 0xcf, 0x8b, 0x9f, 0x03, 0x23	\
 }
 
-const char * __weak mainboard_get_dram_part_num(void)
-{
-	/* Default weak implementation, no need to override part number. */
-	return NULL;
-}
-
 /* Save the DIMM information for SMBIOS table 17 */
 static void save_dimm_info(void)
 {