AGESA fam12 fam14 fam15: Use common agesa_readSpd()

Remove northbridge specific callouts for AGESA_READ_SPD.

Move low-level SMBus code to southbridge.

Change-Id: I5fc91c49d9ef8e0af1c4d8194f857c61ce417d1d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7113
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
diff --git a/src/mainboard/supermicro/h8qgi/BiosCallOuts.c b/src/mainboard/supermicro/h8qgi/BiosCallOuts.c
index 6e6eb6a..7b7d5e1 100644
--- a/src/mainboard/supermicro/h8qgi/BiosCallOuts.c
+++ b/src/mainboard/supermicro/h8qgi/BiosCallOuts.c
@@ -23,7 +23,6 @@
 #include "Ids.h"
 #include "OptionsIds.h"
 #include "heapManager.h"
-#include <northbridge/amd/agesa/family15/dimmSpd.h>
 #include <arch/io.h>
 
 #ifdef __PRE_RAM__
@@ -101,7 +100,7 @@
 
 	original_value = select_socket(((AGESA_READ_SPD_PARAMS *)ConfigPtr)->SocketId);
 
-	Status = agesa_ReadSPD (Func, Data, ConfigPtr);
+	Status = agesa_ReadSpd (Func, Data, ConfigPtr);
 
 	restore_socket(original_value);
 #else