mb/clevo/kbl-u: Add Clevo N130WU/N131WU

Working:
- TianoCore
- NVMe, SATA3
- USB2, USB3
- Thunderbolt
- Graphics (GOP and libgfxinit)
- Sound
- Webcam
- WLAN, LAN, Bluetooth, LTE
- Keyboard, touchpad
- TPM
- flashrom support; reading / flashing from Linux
- ACPI S3

WIP:
- Documentation

Not working:
- EC ACPI (e.g. Fn keys, battery and power information)

Boots Arch Linux (Linux 5.8.12) successfully.

Change-Id: I364f5849ef88f43b85efbd7a635a27e54d08c513
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/28640
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

Documentation/mainboard/clevo/n130wu/index.md

@@ -0,0 +1,47 @@
+# Clevo N130WU
+
+## Hardware
+### Technology
+```eval_rst
++------------------+--------------------------------+
+| CPU              | Intel i7-8550U                 |
++------------------+--------------------------------+
+| PCH              | Intel Sunrise Point LP         |
++------------------+--------------------------------+
+| EC / Super IO    | ITE IT8587E                    |
++------------------+--------------------------------+
+| Coprocessor      | Intel ME                       |
++------------------+--------------------------------+
+```
+
+### Flash chip
+```eval_rst
++---------------------+-----------------+
+| Type                | Value           |
++=====================+=================+
+| Model               | GD25Q64B        |
++---------------------+-----------------+
+| Socketed flash      | no              |
++---------------------+-----------------+
+| Size                | 8 MiB           |
++---------------------+-----------------+
+| In circuit flashing | Yes             |
++---------------------+-----------------+
+| Package             | SOIC-8          |
++---------------------+-----------------+
+| Write protection    | No              |
++---------------------+-----------------+
+| Dual BIOS feature   | No              |
++---------------------+-----------------+
+| Internal flashing   | Yes             |
++---------------------+-----------------+
+```
+
+## Board status
+### Working
+### Not Working
+### Work in progress
+### Untested
+
+## Also known as
+* TUXEDO InfinityBook Pro 13 v3

Documentation/mainboard/index.md

@@ -26,6 +26,10 @@ This section contains documentation about coreboot on specific mainboards.
 
 - [CN81XX EVB SFF](cavium/cn8100_sff_evb.md)
 
+## Clevo
+
+- [N130WU / N131WU](clevo/n130wu/index.md)
+
 ## Dell
 
 - [OptiPlex 9010 SFF](dell/optiplex_9010.md)