Otherwise the clocks are not enabled and reading registers will BUG.
Fixes: 1e30b8d755b8 ("net: smsc911x: Make Runtime PM handling more fine-grained")
Suggested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>