soc: move mainboard_get_dram_part_num prototype to memory_info.h

BUG=b:169774661, b:168724473
TEST="emerge-volteer coreboot && emerge-nocturne coreboot &&
emerge-dedede coreboot" and verify they build successfully.

Change-Id: I8b228475621ca1035fe13f8311355fc3b926e897
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45879
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/include/memory_info.h

@@ -108,4 +108,10 @@ struct memory_info {
 	struct dimm_info dimm[DIMM_INFO_TOTAL];
 } __packed;
 
+/*
+ * mainboard_get_dram_part_num returns a DRAM part number override string
+ *  return NULL = no part number override provided by mainboard
+ *  return non-NULL = pointer to a string terminating in '\0'
+ */
+const char *mainboard_get_dram_part_num(void);
 #endif

src/soc/intel/alderlake/include/soc/romstage.h

@@ -6,8 +6,6 @@
 #include <fsp/api.h>
 #include <stddef.h>
 
-/* Provide a callback to allow mainboard to override the DRAM part number. */
-const char *mainboard_get_dram_part_num(void);
 void mainboard_memory_init_params(FSPM_UPD *mupd);
 void systemagent_early_init(void);
 void romstage_pch_init(void);

src/soc/intel/cannonlake/include/soc/romstage.h

@@ -7,8 +7,6 @@
 
 void mainboard_memory_init_params(FSPM_UPD *mupd);
 
-/* Provide a callback to allow mainboard to override the DRAM part number. */
-const char *mainboard_get_dram_part_num(void);
 void systemagent_early_init(void);
 void romstage_pch_init(void);
 

src/soc/intel/elkhartlake/include/soc/romstage.h

@@ -5,8 +5,6 @@
 
 #include <fsp/api.h>
 
-/* Provide a callback to allow mainboard to override the DRAM part number. */
-const char *mainboard_get_dram_part_num(void);
 void mainboard_memory_init_params(FSPM_UPD *mupd);
 void systemagent_early_init(void);
 void romstage_pch_init(void);

src/soc/intel/jasperlake/include/soc/romstage.h

@@ -5,8 +5,6 @@
 
 #include <fsp/api.h>
 
-/* Provide a callback to allow mainboard to override the DRAM part number. */
-const char *mainboard_get_dram_part_num(void);
 void mainboard_memory_init_params(FSPM_UPD *mupd);
 void systemagent_early_init(void);
 void romstage_pch_init(void);

src/soc/intel/tigerlake/include/soc/romstage.h

@@ -5,8 +5,6 @@
 
 #include <fsp/api.h>
 
-/* Provide a callback to allow mainboard to override the DRAM part number. */
-const char *mainboard_get_dram_part_num(void);
 void mainboard_memory_init_params(FSPM_UPD *mupd);
 void systemagent_early_init(void);
 void romstage_pch_init(void);