phy: cadence: Sierra: Fix error return code in cdns_sierra_phy_probe()

phy: cadence: Sierra: Fix error return code in cdns_sierra_phy_probe()

commit 6411e386db0a477217607015e7d2910d02f75426 upstream.

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: a43f72ae136a ("phy: cadence: Sierra: Change MAX_LANES of Sierra to 16")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com>
Link: https://lore.kernel.org/r/20210517015749.127799-1-wangwensheng4@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>