usb: core: phy: clean up return value check about devm_of_phy_get_by_index()

Use IS_ERR() instead of IS_ERR_OR_NULL() because devm_of_phy_get_by_index()
never return NULL value;
But still need ignore the error of -ENODEV, for more information, please
refer to:
[0] https://lkml.org/lkml/2018/4/19/88
[1] https://patchwork.kernel.org/patch/10160181/

Signed-off-by: Chunfeng Yun <[email protected]>
Reviewed-by: Johan Hovold <[email protected]>
Reviewed-by: Martin Blumenstingl <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

0 files changed, 0 insertions, 0 deletions