gen: only bind loader and bl1
gen: only bind loader and bl1

Remove partition tables from the output image. Since it conflicts with
the mechanism that OnChipROM loading program from eMMC.

Signed-off-by: Haojian Zhuang <979139d45d262f0480136b0da512e0afa0fe79d3@gmail.com>

96boards-hikey/l-loader,96boards-hikey/l-loader