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>
27 files changed