Especially with systemd its seen that psplash-start service starts
before /dev/fb0 is created by kernel which results in
[FAILED] Failed to start Start psplash boot splash screen.
this is quite frequent race now with kernel 6.1
Add device dependency on sys-devices-platform-gpu-graphics-fb0.device
via a unit file drop-in
Signed-off-by: Khem Raj <raj.khem@gmail.com>