CBMEM tables: Remove references to global high_tables_base

Unify checks and writing of CBMEM tables for x86 and ARMv7.

Change-Id: I89c012bce1b86d0710748719a8840ec532ce6939
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3559
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

@@ -37,11 +37,7 @@ struct lb_memory *write_tables(void)
 {
 	unsigned long table_pointer, new_table_pointer;
 
-	if (!high_tables_base) {
-		printk(BIOS_ERR, "ERROR: high_tables_base is not set.\n");
-	}
-
-	printk(BIOS_DEBUG, "high_tables_base: %llx.\n", high_tables_base);
+	cbmem_base_check();
 
 	post_code(0x9d);