dt-bindings: convert ata/cortina,gemini-sata-bridge to yaml

This patch converts ata/cortina,gemini-sata-bridge binding to yaml

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220211120157.3385145-1-clabbe@baylibre.com