AMD and GFXUMA: drop redundant use of lb_add_memory_range()

Use of uma_resource() in AMD northbridge code created a memory
resource marked as reserved. Such resources are removed
from system memory in write_coreboot_table().

Change-Id: Ib5e49e851d6622d8ece9d6d612e245b3962b9167
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1233
Tested-by: build bot (Jenkins)
Reviewed-by: Rudolf Marek <r.marek@assembler.cz>

src/mainboard/amd/south_station/mainboard.c

@@ -87,15 +87,6 @@ static void southstation_enable(device_t dev)
 
 int add_mainboard_resources(struct lb_memory *mem)
 {
-	/* UMA is removed from system memory in the northbridge code, but
-	 * in some circumstances we want the memory mentioned as reserved.
- 	 */
-#if CONFIG_GFXUMA
-	printk(BIOS_INFO, "uma_memory_start=0x%llx, uma_memory_size=0x%llx \n",
-		    uma_memory_base, uma_memory_size);
-	lb_add_memory_range(mem, LB_MEM_RESERVED, uma_memory_base,
-			    uma_memory_size);
-#endif
 	return 0;
 }
 struct chip_operations mainboard_ops = {