boot: remove cbmem_post_handling()

The cbmem_post_handling() function was implemented by 2
chipsets in order to save memory configuration in flash. Convert
both of these chipsets to use the boot state machine callbacks
to perform the saving of the memory configuration.

Change-Id: I697e5c946281b85a71d8533437802d7913135af3
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/3137
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/include/cbmem.h

@@ -159,7 +159,6 @@ void *cbmem_find(u32 id);
 /* Ramstage only functions. */
 void cbmem_list(void);
 void cbmem_arch_init(void);
-void __attribute__((weak)) cbmem_post_handling(void);
 void cbmem_print_entry(int n, u32 id, u64 start, u64 size);
 #else
 static inline void cbmem_arch_init(void) {}