forked from OERV-BSP/u-boot
Initialize 'igd' and 'sdvo' to NULL so that we just need to test them against NULL later, to be compatible with that case that IGD and SDVO devices were already in disabled state. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>