dt-bindings: PCI: ftpci100: convert faraday,ftpci100 to YAML

Converts pci/faraday,ftpci100.txt to yaml.
Some change are also made:
- example has wrong interrupts place

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Link: https://lore.kernel.org/r/20210628193508.2826903-1-clabbe@baylibre.com


Signed-off-by: Rob Herring <robh@kernel.org>