Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Update the definition for number of scratch pages to match the latest
version of the XHCI specification. Make sure the code can handle the
maximum number of allowed scratch pages.

Submitted by: Shichun_Ma@Dell.com
Approved by: re (hrs)
MFC after: 1 week

dev/usb: minor spelling fixes in comments.

No functional change.

Reviewed by: hselasky

Improve support for Intel Lynx Point USB 3.0 controllers by masking
the port routing bits like done in Linux.

MFC after: 1 week
Tested by: Tur-Wei Chan <twchan@singnet.com.sg>

Setting the IMOD value below 0x3F8 can cause IRQ lockups in the Intel
LynxPoint USB 3.0 controllers found in MacBookPro 2013's.

MFC after: 2 days
Tested by: Huang Wen Hui <huanghwh@gmail.com>

Correct IMOD default value according to comment.

Reported by: Daniel O'Connor <doconnor@gsoft.com.au>
MFC after: 1 week

Use the correct constant for 8000 IRQ/s.

MFC after: 1 week

For Intel Panther/Lynx Point USB 3.0 xHCI controllers enable SuperSpeed USB
capability and reroute USB 2.0 ports to the xHCI controller.

Reviewed by: hselasky

Fix definition of XHCI port power bit.

Reported by: Kohji Okuno
MFC after: 3 days

Fix suspend and resume of FULL and HIGH speed USB devices
in the generic XHCI driver. There appears to be some minor
logic missing for this feature to work.

MFC after: 3 days

Renamed PCI_INTERFACE_XHCI to PCIP_SERIALBUS_USB_XHCI and moved it
to <dev/pci/pcireg.h>.

Reviewed by: hselasky
MFC after: 3 days

Commit initial version of new XHCI driver which was written from
scratch. This driver adds support for USB3.0 devices. The XHCI
interface is also backwards compatible to USB2.0 and USB1.0 and will
evntually replace the OHCI/UHCI and EHCI drivers.

There will be follow-up commits during the coming week to link the
driver into the default kernel build and add missing USB3.0
functionality in the USB core. Currently only the driver files are
committed.

Approved by: thompsa (mentor)