mainboard/lenovo/t410: Add new port

The port is based on the x201 / t410s.
2537-vg5 / i5, no discrete gpu

Tested and working:
* Native raminit
* Native gfxinit
* Booting Seabios 1.12.1
* Booting from EHCI
* Running GNU/Linux 5.0.0
* No errors in dmesg
* EHCI debug on the devices left side, bottom-right
* Keyboard
* Fn keys (Mute, Volume, Mic)
* Touchpad
* TPM
* Wifi
* Sound
* USB
* Ethernet
* S3 resume
* VBOOT

Testing in progress.

Untested:
* VGA
* Displayport
* Docking station

Bugs:
* AC adapter can't be read from ACPI
* TPM not working with VBOOT and C_ENV BB

Details for flashing externally:
1. Disconnect all power
2. Connect the external flasher
3. Connect the power cord (This fixes internal power control)
4. Remove the power cord

Change-Id: Id9d872e643dd242e925bfb46d18076e6ad100995
Signed-off-by: Nicolas Reinecke <nr@das-labor.org>
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/11791
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

Documentation/mainboard/index.md

@@ -68,6 +68,10 @@ The boards in this section are not real mainboards, but emulators.
 - [T4xx common](lenovo/t4xx_series.md)
 - [X2xx common](lenovo/x2xx_series.md)
 
+### Nehalem series
+
+- [T410](lenovo/t410.md)
+
 ### Sandy Bridge series
 
 - [T420](lenovo/t420.md)
@@ -82,6 +86,10 @@ The boards in this section are not real mainboards, but emulators.
 - [T430 / T530 / X230 / W530 common](lenovo/xx30_series.md)
 - [T431s](lenovo/t431s.md)
 
+## Portwell
+
+- [PQ7-M107](portwell/pq7-m107.md)
+
 ## MSI
 
 - [MS-7707](msi/ms7707/ms7707.md)

Documentation/mainboard/lenovo/t410.md

@@ -0,0 +1,44 @@
+# Lenovo T410
+
+## Known issues
+* Dock has wrong ACPI ID (causes "AC adapter state cannot be read" in Linux)
+* TPM not working with VBOOT and C_ENV bootblock (works without C_ENV BB)
+
+## Flashing instructions
+```eval_rst
++---------------------+--------------------------------+
+| Type                | Value                          |
++=====================+================================+
+| Socketed flash      | no                             |
++---------------------+--------------------------------+
+| Size                | 8 MiB                          |
++---------------------+--------------------------------+
+| In circuit flashing | Only in S3/WoL                 |
++---------------------+--------------------------------+
+| Package             | SOIC-8                         |
++---------------------+--------------------------------+
+| Write protection    | No                             |
++---------------------+--------------------------------+
+| Dual BIOS feature   | No                             |
++---------------------+--------------------------------+
+| Internal flashing   | Yes                            |
++---------------------+--------------------------------+
+```
+
+The flash IC is located at the bottom center of the mainboard.  Sadly,
+access to the IC is blocked by the magnesum frame, so you need to disassemble
+the entire laptop and remove the mainboard.
+
+Below is a picture of IC on the mainboard, with the pinouts labeled.
+
+![t410_chip_location](t410_chip_location.jpg)
+
+The chip will either be a Macronix MX25L6405D or a Winbond W25Q64CVSIG.
+Do not rely on dots painted in the corner of the chip (such as the blue dot
+pictured) to orient the pins!
+
+[Flashing tutorial](../../flash_tutorial/no_ext_power.md)
+
+Steps to access the flash IC are described here [T4xx series].
+
+[T4xx series]: t4xx_series.md