clk: renesas: rcar-usb2-clock-sel: Fix kernel NULL pointer dereference

The probe was manually passing NULL instead of dev to devm_clk_hw_register.
This caused a Unable to handle kernel NULL pointer dereference error.
Fix this by passing 'dev'.

Signed-off-by: Adam Ford <[e-mail]>
Fixes: a20a40a8bbc2 ("clk: renesas: rcar-usb2-clock-sel: Fix error handling in .probe()")
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/renesas/rcar-usb2-clock-sel.c

···
 	init.ops = &usb2_clock_sel_clock_ops;
 	priv->hw.init = &init;
 
-	ret = devm_clk_hw_register(NULL, &priv->hw);
+	ret = devm_clk_hw_register(dev, &priv->hw);
 	if (ret)
 		goto pm_put;