CBMEM: Unify get_top_of_ram()

Change-Id: Ic40a51638873642f33c74d80ac41cf082b2fb177
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3904
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/include/cbmem.h

@@ -146,6 +146,8 @@ extern struct cbmem_entry *get_cbmem_toc(void);
 
 /* Common API between cbmem and dynamic cbmem. */
 
+unsigned long get_top_of_ram(void);
+
 /* By default cbmem is attempted to be recovered. Returns 0 if cbmem was
  * recovered or 1 if cbmem had to be reinitialized. */
 int cbmem_initialize(void);