Documentation: Remove confusing xyz0 naming convention for Lenovo devices

Replace xx30 with Ivy_Bridge and xx20 with Sandy_Bridge.
Also add a note that the Ivy_Bridge tutorial doesn't covert T430s and T431s.

Change-Id: I0b65bca83195ec22cc139130e7cb6183c0972484
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38929
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Peter Lemenkov <lemenkov@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

Documentation/mainboard/index.md

@@ -82,7 +82,7 @@ The boards in this section are not real mainboards, but emulators.
 ### Sandy Bridge series
 
 - [T420](lenovo/t420.md)
-- [T420 / T520 / X220 / T420s / W520 common](lenovo/xx20_series.md)
+- [T420 / T520 / X220 / T420s / W520 common](lenovo/Sandy_Bridge_series.md)
 - [x1](lenovo/x1.md)
 
 ### Ivy Bridge series
@@ -90,7 +90,7 @@ The boards in this section are not real mainboards, but emulators.
 - [T430](lenovo/t430.md)
 - [T530](lenovo/w530.md)
 - [W530](lenovo/w530.md)
-- [T430 / T530 / X230 / W530 common](lenovo/xx30_series.md)
+- [T430 / T530 / X230 / W530 common](lenovo/Ivy_Bridge_series.md)
 - [T431s](lenovo/t431s.md)
 - [Internal flashing](lenovo/ivb_internal_flashing.md)
 

Documentation/mainboard/lenovo/Ivy_Bridge_series.md

@@ -1,5 +1,7 @@
 # Lenovo Ivy Bridge series
 
+This information is valid for all supported models, except T430s and T431s.
+
 ## Flashing coreboot
 ```eval_rst
 +---------------------+--------------------------------+
@@ -72,5 +74,5 @@ region. The update is then written into the EC once.
 
 ![][fl]
 
-[fl]: flashlayout_xx30.svg
+[fl]: flashlayout_Ivy_Bridge.svg
 

Documentation/mainboard/lenovo/Sandy_Bridge_series.md

@@ -44,5 +44,5 @@ region. The update is then written into the EC once.
 
 ![][fl]
 
-[fl]: flashlayout_xx20.svg
+[fl]: flashlayout_Sandy_Bridge.svg
 

Documentation/mainboard/lenovo/t420.md

@@ -22,4 +22,4 @@ For more details have a look at [T420 / T520 / X220 / T420s / W520 common] and
 Steps to access the flash IC are described here [T4xx series].
 
 [T4xx series]: t4xx_series.md
-[T420 / T520 / X220 / T420s / W520 common]: xx20_series.md
+[T420 / T520 / X220 / T420s / W520 common]: Sandy_Bridge_series.md

Documentation/mainboard/lenovo/t430.md

@@ -12,4 +12,4 @@ For more details have a look at [T430 / T530 / X230 / T430s / W530 common] and
 Steps to access the flash IC are described here [T4xx series].
 
 [T4xx series]: t4xx_series.md
-[T430 / T530 / X230 / T430s / W530 common]: xx30_series.md
+[T430 / T530 / X230 / T430s / W530 common]: Ivy_Bridge_series.md

Documentation/mainboard/lenovo/t431s.md

@@ -39,4 +39,4 @@ inteltool, and replace the content of the SPD hex with what is dumped.
 I do not know how to find gpio ports for that, and SPD data stored in
 vendor firmware.)
 
-[T420 / T520 / X220 / T420s / W520 common]: xx20_series.md
+[T420 / T520 / X220 / T420s / W520 common]: Sandy_Bridge_series.md

Documentation/mainboard/lenovo/w530.md

@@ -24,4 +24,4 @@ For more details have a look at [T430 / T530 / X230 / T430s / W530 common] and
 
 [w530-2]: w530-2.jpg
 
-[T430 / T530 / X230 / T430s / W530 common]: xx30_series.md
+[T430 / T530 / X230 / T430s / W530 common]: Ivy_Bridge_series.md

Documentation/mainboard/lenovo/x1.md

@@ -21,4 +21,4 @@ For more details have a look at [T420 / T520 / X220 / T420s / W520 common] and
 Steps to access the flash IC are described here [X2xx series].
 
 [X2xx series]: x2xx_series.md
-[T420 / T520 / X220 / T420s / W520 common]: xx20_series.md
+[T420 / T520 / X220 / T420s / W520 common]: Sandy_Bridge_series.md