[PATCH 2/7] usb: mtu3: use boolean return value

[AngeloGioacchino Del Regno]

Il 03/04/23 04:52, Chunfeng Yun ha scritto:
> Prefer to use boolean value due to gpd_ring_empty() return true or false.
> See "16) Function return values and names" in coding-style.rst
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun at mediatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>