Translate driver-api/phy.rst into Chinese.

commit d02aa181 ("phy: Add devm_of_phy_optional_get() helper")
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240625130909.3672446-1-siyanteng@loongson.cn