u-boot: Add RDEPENDS on rpi-u-boot-scr
u-boot: Add RDEPENDS on rpi-u-boot-scr

The boot.cmd file created by rpi-u-boot-scr is needed for u-boot to
automatically boot a RaspberryPi.

Signed-off-by: Paul Barker <a027184a55211cd23e3f3094f1fdc728df5e0500@paulbarker.me.uk>

schnitzeltony/meta-raspi-light,schnitzeltony/meta-raspi-light