CBMEM: Add cbmem_late_set_table() and drop references to high_tables_base

This helper function is for compatibility only for chipsets that do
not implement get_top_of_ram() to support early CBMEM.

Also remove references to globals high_tables_base and _size under
arch/ and from two ARMv7 boards.

Change-Id: I17eee30635a0368b2ada06e0698425c5ef0ecc53
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3902
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/include/cbmem.h

@@ -137,6 +137,7 @@ void cbmem_add_lb_mem(struct lb_memory *mem);
 #ifndef __PRE_RAM__
 extern uint64_t high_tables_base, high_tables_size;
 void set_top_of_ram(uint64_t ramtop);
+void cbmem_late_set_table(uint64_t base, uint64_t size);
 void set_cbmem_toc(struct cbmem_entry *);
 #endif