Integrate u-boot-seco-rk/ap/c31-bootdelay-0

Commit: https://git.seco.com/edgehog/bsp/rockchip/u-boot-seco-rk/-/commit/0fbd9c4765fd83bf25f5c2dda0ca93ffaa60c138

[C31][DEFCONFIG] set bootdelay=0

Set bootdelay=0 in the defconfig for C31