CBMEM x86: Unify get_cbmem_toc()

Remove any chipset-specific implementations and use arch-specific
implementation of get_cbmem_table() instead.

Change-Id: I338ee2c1bd51f5e517462115170dc926e040159e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3907
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/northbridge/intel/sandybridge/raminit.c

@@ -305,11 +305,6 @@ void sdram_initialize(struct pei_data *pei_data)
 		save_mrc_data(pei_data);
 }
 
-struct cbmem_entry *get_cbmem_toc(void)
-{
-	return (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE);
-}
-
 unsigned long get_top_of_ram(void)
 {
 	/* Base of TSEG is top of usable DRAM */