Port AGESA based northbridge code to 64bit

This is extending http://review.coreboot.org/#/c/10583/
(29e6548) to the remaining AGESA northbridge drivers.

Change-Id: I6fa53b36a1420e92cb4aecb0f7b4c71541a94c71
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/11021
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index b043ccc..dee2616 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -468,11 +468,13 @@
 
 	addr = agesawrapper_getlateinitptr(PICK_WHEA_MCE);
 	if (addr != NULL)
-		current += acpi_create_hest_error_source(hest, current, 0, (void *)((u32)addr + 2), *(UINT16 *)addr - 2);
+		current += acpi_create_hest_error_source(hest, current, 0,
+				addr + 2, *(UINT16 *)addr - 2);
 
 	addr = agesawrapper_getlateinitptr(PICK_WHEA_CMC);
 	if (addr != NULL)
-		current += acpi_create_hest_error_source(hest, current, 1, (void *)((u32)addr + 2), *(UINT16 *)addr - 2);
+		current += acpi_create_hest_error_source(hest, current, 1,
+				addr + 2, *(UINT16 *)addr - 2);
 
 	return (unsigned long)current;
 }