configs: rockchip: change the secure otp macro as CONFIG_SPL_ROCKCHIP_SECURE_OTP

Signed-off-by: Jason Zhu <jason.zhu@rock-chips.com>
Change-Id: I8039b73858b33917d5b84caecd2b925dead3082c

configs: Add rk3399-spl-fit.config

Output the SPL to be able to load FIT uboot.img.

Change-Id: Ice63d3d0e5793a10df823d44ccbe4700826f3dbd
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>