board: dh_stm32mp1: Only print board code with CONFIG_SPL_DISPLAY_PRINT

Ensure that the SoM and board code information is only printed when
CONFIG_SPL_DISPLAY_PRINT is set.

Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
1 file changed