Cppcheck shows here duplicated break.
Code `state->speed = SPEED_1000;` will be never executed because above
it there is break statement.
Almost identical statement is placed in another realtek driver
18a53d43d6/target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/dsa.c (L286-L294)
Signed-off-by: Rafał Mikrut <mikrutrafal@protonmail.com>