phy: starfive: fix error code in probe

This is using the wrong pointer, "phy->regs" vs "phy->phy".

Fixes: fd097f48

 ("phy: starfive: Add JH7110 PCIE 2.0 PHY driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/3cc81f2a-efd7-4ef7-ae6b-e38c91efe153@moroto.mountain
Signed-off-by: Vinod Koul <vkoul@kernel.org>