scripts/flasher.sh: update video mode to match curent naming
scripts/flasher.sh: update video mode to match curent naming

Naming of connector has changed from "LVDS" to "Unknown" on recent kernel.
As we now use kernel 4.4.x, we move to this new naming.

Signed-off-by: Nicolas Ferre <45b517be0e5ec6dc3a39715767c1d18e090d39b4@atmel.com>

alexandrebelloni/meta-atmel,alexandrebelloni/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,alexandrebelloni/meta-atmel