[usbdev] DRAFT Always On USB Wake detection module
[usbdev] DRAFT Always On USB Wake detection module

Uploaded for discussion. Has not been included in any build
(i.e. expect syntax errors etc).

Discussion in issue #3530

Signed-off-by: Mark Hayter <ebfeb6e5bfe06394fb426e70ac09d191aa11b8c5@gmail.com>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan