intelspi: Add support for ddb/kdb -compatible polled mode

Required for Apple and Microsoft -compatible HID-over-SPI drivers.

Most logic was already implemented in commit 3c0867343819
"spibus: exten

intelspi: Add support for ddb/kdb -compatible polled mode

Required for Apple and Microsoft -compatible HID-over-SPI drivers.

Most logic was already implemented in commit 3c0867343819
"spibus: extend API: add cs_delay ivar, KEEP_CS and NO_SLEEP flags".
It dissallowed driver sleeps in the interrupt context. This commit
extends this feature to handle ddb/kdb context with following:
- Skip driver locking if SPI functions were called from kdb/ddb.
- Reinitialize controller if kdb/ddb initiated SPI transfer has
interrupted another already running one. Does not work very
reliable yet.

Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41247

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intelspi: Move ACPI/PCI ids table out of header file.

There is no reason to store it multiple times.

MFC after: 1 week
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41244

intelspi: add PCI attachment (Lynx/Wildcat/Sunrise Point)

Also adds fixups and cleanups:

- apply the child's mode/speed
- implement suspend/resume support
- use RF_SHAREABLE interrupts
- use bus_de

intelspi: add PCI attachment (Lynx/Wildcat/Sunrise Point)

Also adds fixups and cleanups:

- apply the child's mode/speed
- implement suspend/resume support
- use RF_SHAREABLE interrupts
- use bus_delayed_attach_children since the transfer can use interrupts
- add support for newly added spibus features (cs_delay and flags)

Operation tested on Broadwell (Wildcat Point) MacBookPro12,1.
Attachment also tested on Kaby Lake (Sunrise Point) Pixelbook.

Reviewed by: wulf
MFC after: 1 month
Differential revision: https://reviews.freebsd.org/D29249

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