dt-bindings: vendor-prefix: new vendor - Emlid

Add vendor Emlid Ltd to vendor-prefixes.txt

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Aleksandr Aleksandrov <aleksandr.aleksandrov@emlid.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>