dt-bindings: net: dwmac: sti: remove stih415/sti416/stid127

Remove compatible for stih415/stih416 and stid127 which are
no more supported.

Signed-off-by: Alain Volmat <avolmat@me.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://lore.kernel.org/r/20230416195857.61284-1-avolmat@me.com


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