usb: dwc2: add parenthess and space around *

Just fix the following checkpatch error:
ERROR: Macros with complex values should be enclosed in parentheses.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>
Link: https://lore.kernel.org/r/1617001556-61868-1-git-send-email-tiantao6@hisilicon.com


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