dt-bindings: leds: sun50i-a100: Add compatible for Allwinner A523 SoC

The Allwinner A523 SoC family features an identical LED controller as
found on the A100.

Add a SoC-specific compatible for it, with fallback to the A100 one.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://patch.msgid.link/20260302152724.3197587-2-wens@kernel.org


Signed-off-by: Chen-Yu Tsai <wens@kernel.org>