feat(juno): support ARM_IO_IN_DTB option for Juno

feat(juno): support ARM_IO_IN_DTB option for Juno

Add UUIDs for loadable FIP images to Juno's tb_fw_config device tree, so
that it can be built with the ARM_IO_IN_DTB option. Increase the
max-size of the tb_fw-config image accordingly, as the new entries
enlarge that image(new size is 2,116 bytes, rounded up to 2,560 =
0xA00)

Signed-off-by: Rob Hughes <robert.hughes@arm.com>
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
Change-Id: I557bca7dd32c3be084bbba11d84dfa2818cb6789