S3: Use old heap during normal boot

During normal boot, the cbmem is uninitialized. So it is illegal to find
the heap in cbmem.

Change-Id: I8b5e1dbf1124819ed91693a86a6dbe41aea109e5
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: zbao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/904
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>

src/mainboard/amd/persimmon/BiosCallOuts.h

@@ -23,6 +23,7 @@
 #include "Porting.h"
 #include "AGESA.h"
 
+#define BIOS_HEAP_START_ADDRESS			0x10000 /* HEAP during cold boot */
 #define BIOS_HEAP_SIZE				0x20000
 #define BSP_STACK_BASE_ADDR			0x30000