dt-bindings: vendor-prefixes: add prefix for Pegatron Corporation

dt-bindings: vendor-prefixes: add prefix for Pegatron Corporation

PEGATRON Corporation is a Taiwanese electronics manufacturing company that
mainly develops computing, communications and consumer electronics for
branded vendors. Link https://www.pegatroncorp.com/

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250429061803.9581-2-clamor95@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>