Add the internal SGMII/SerDes PHY node for sa8775p platforms.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Andrew Halaney <ahalaney@redhat.com>
Link: https://lore.kernel.org/r/20230622120142.218055-2-brgl@bgdev.plSigned-off-by: Bjorn Andersson <andersson@kernel.org>