ARM: enable LTO for some boards
Enable LTO for some boards that were tested by people on U-Boot Mailing List. Signed-off-by:Marek Behún <marek.behun@nic.cz> Tested-by:
Adam Ford <aford173@gmail.com> Tested-by:
Pali Rohár <pali@kernel.org> Tested-by:
Tim Harvey <tharvey@gateworks.com>