uboot-phytec

stm32mp1: configs: Set bootdelay to 1

This allows to display splashcreen without waiting
an extra delay of 2 seconds due to default value of bootdelay.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>