configs: update rk3288 veyron defconfigs

Updates jerry, mickey, minnie and speedy defconfigs to:
- fit the SPL in 32k
- boot from SPI (only)
- remove gadget support (these have no OTG port)

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Urja Rannikko <urjaman@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
(Rebase on top of tree)
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>