samsung/exynos5250: Add update-bl1.sh
drwxr-xr-x - cpu
drwxr-xr-x - documentation
drwxr-xr-x - mainboard
drwxr-xr-x - northbridge
drwxr-xr-x - pi
drwxr-xr-x - soc
drwxr-xr-x - southbridge