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/arch/armv7/tables.c

@@ -29,13 +29,6 @@
 
 #define MAX_COREBOOT_TABLE_SIZE (8 * 1024)
 
-/*
- * TODO: "High" tables are a convention used on x86. Maybe we can
- * clean up that naming at some point.
- */
-uint64_t high_tables_base = 0;
-uint64_t high_tables_size;
-
 void cbmem_arch_init(void)
 {
 }