According to the kernel coding style, use one space around the binary "|"
operator.

Add spaces around it.

Link: https://lore.kernel.org/r/1596454442-220565-1-git-send-email-chenxiang66@hisilicon.comSigned-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>