usb: xhci-mtk: remove or operator for setting schedule parameters

Side effect may happen if use or operator to set schedule parameters
when the parameters are already set before. Set them directly due to
other bits are reserved.

Fixes: 54f6a8af ("usb: xhci-mtk: skip dropping bandwidth of unchecked endpoints")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/d287899e6beb2fc1bfb8900c75a872f628ecde55.1615170625.git.chunfeng.yun@mediatek.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>