Add hardware support specification

doc/hardware.rst

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+IoT Reference OS Kit for Intel(r) Architecture Hardware Support
+###############################################################
+
+IoT Reference OS Kit supports a selection of hardware that have been tested to
+work to a limited extent, specified here. IoT Reference OS Kit may also work
+on other Intel(r) Architecture hardware, but it has not been tested.
+
+System boards
+=============
+
+This secion lists system boards that are supported.
+
+MinnowBoard Turbot
+------------------
+
+Supported BIOS version is 94. Following on-board devices/interfaces have been
+tested to work.
+
+ - Serial console
+ - USB 2.0 and 3.0
+ - Ethernet
+ - GPU with HDMI output
+ - Audio output over HDMI
+ - microSD
+ - GPIO
+ - PCIe (with Silverjaw Lure)
+
+Following on-board devices/interfaces have not been tested.
+
+ - I2C
+ - SPI
+ - I2S
+ - PWM
+ - SATA
+ - XDP
+
+There are currently no known non-functional devices/interfaces.
+
+Intel 570x
+----------
+
+Supported BIOS version is 163. Following on-board devices/interfaces have been
+tested to work.
+
+ - Serial console
+ - USB 3.0 Type-A
+ - GPU with HDMI output
+ - Audio output over HDMI
+ - WiFi/BT adapter
+ - eMMC
+ - microSD
+ - GPIO
+
+Following on-board devices/interfaces have not been tested.
+
+ - I2C
+ - SPI
+ - I2S
+ - PWM
+ - MIPI DSI
+ - MIPI CSI
+
+Following on-board devices/interfaces are known not to work.
+
+ - USB 3.1 Type-C
+
+Peripherals
+===========
+
+USB Mass Storage
+----------------
+
+Devices compliant with USB Mass Storage device class have been tested to work.
+
+USB Communication
+-----------------
+
+Devices compliant with USB Communication Device Class (CDC) have been tested
+to work.
+
+USB Audio
+---------
+
+Devices compliant with USB Audio Class 1.0 and 2.0 should work, but have not
+been tested.
+
+USB Video
+---------
+
+Devices compliant with USB Video Class have been tested to work.
+
+USB Ethernet
+------------
+
+Following USB Ethernet adapters have been tested to work.
+
+ - ASIX AX8817X
+
+USB Serial
+----------
+
+Following USB Serial adapters have been tested to work.
+
+ - FTDI
+
+PCIe Wireless
+-------------
+
+Following PCIe wireless adapters have been tested to work.
+
+ - Intel(R) Dual Band Wireless N 7260 (WiFi)
+