The usb_get_phy() function returns either a valid pointer to phy or
ERR_PTR() error, check for NULL always fails and may lead to oops on
error path, fix this issue.
Signed-off-by: NVladimir Zapolskiy <vz@mleia.com>
Signed-off-by: NBin Liu <b-liu@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>