Documentation: Move firmware flashing tutorial to tutorial section

There is no need that the tutorial for flashing firmware has its own
point in the main menu. Thus, move it to the tutorial section.

Change-Id: Ife6d97254af4c006fe01480a78c76303f9cb34bb
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62424
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Thomas Heijligen <src@posteo.de>

Documentation/mainboard/lenovo/Ivy_Bridge_series.md

@@ -38,7 +38,7 @@ This information is valid for all supported models, except T430s, [T431s](t431s.
 * ROM chip size should be set to 12MiB.
 
 ```eval_rst
-Please also have a look at :doc:`../../flash_tutorial/index`.
+Please also have a look at :doc:`../../tutorial/flashing_firmware/index`.
 ```
 
 ## Splitting the coreboot.rom
@@ -90,4 +90,4 @@ Tests on Lenovo W530 showed no issues with a stripped and shrunken ME firmware.
 
 
 [me_cleaner]: ../../northbridge/intel/sandybridge/me_cleaner.md
-[external programmer]: ../../flash_tutorial/index.md
+[external programmer]: ../../tutorial/flashing_firmware/index.md

Documentation/mainboard/lenovo/Sandy_Bridge_series.md

@@ -70,5 +70,5 @@ the remaining space for the `bios` partition.
 
 
 [me_cleaner]: ../../northbridge/intel/sandybridge/me_cleaner.md
-[external programmer]: ../../flash_tutorial/index.md
-[flashing tutorial]: ../../flash_tutorial/index.md
+[external programmer]: ../../tutorial/flashing_firmware/index.md
+[flashing tutorial]: ../../tutorial/flashing_firmware/index.md

Documentation/mainboard/lenovo/ivb_internal_flashing.md

@@ -361,4 +361,4 @@ Note that you should have an external SPI programmer as a backup method.
 It will help you recover if you flash non-working ROM by mistake.
 
 
-[flash internally]: ../../flash_tutorial/int_flashrom.md
+[flash internally]: ../../tutorial/flashing_firmware/int_flashrom.md

Documentation/mainboard/lenovo/t410.md

@@ -37,7 +37,7 @@ 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)
+[Flashing tutorial](../../tutorial/flashing_firmware/no_ext_power.md)
 
 Steps to access the flash IC are described here [T4xx series].
 

Documentation/mainboard/lenovo/t420.md

@@ -53,5 +53,5 @@ Steps to access the flash IC are described here [T4xx series].
  * Suspend (Windows 10)
 
 [T4xx series]: t4xx_series.md
-[flashing tutorial]: ../../flash_tutorial/ext_power.md
+[flashing tutorial]: ../../tutorial/flashing_firmware/ext_power.md
 [T420 / T520 / X220 / T420s / W520 common]: Sandy_Bridge_series.md

Documentation/mainboard/lenovo/t430.md

@@ -9,6 +9,6 @@ the general [flashing tutorial].
 
 Steps to access the flash IC are described here [T4xx series].
 
-[flashing tutorial]: ../../flash_tutorial/ext_power.md
+[flashing tutorial]: ../../tutorial/flashing_firmware/ext_power.md
 [T4xx series]: t4xx_series.md
 [T430 / T530 / X230 / T430s / W530 common]: Ivy_Bridge_series.md

Documentation/mainboard/lenovo/w530.md

@@ -22,5 +22,5 @@ the general [flashing tutorial].
 
 [w530-2]: w530-2.jpg
 
-[flashing tutorial]: ../../flash_tutorial/ext_power.md
+[flashing tutorial]: ../../tutorial/flashing_firmware/ext_power.md
 [T430 / T530 / X230 / T430s / W530 common]: Ivy_Bridge_series.md

Documentation/mainboard/lenovo/x1.md

@@ -18,5 +18,5 @@ the general [flashing tutorial].
 Steps to access the flash IC are described here [X2xx series].
 
 [X2xx series]: x2xx_series.md
-[flashing tutorial]: ../../flash_tutorial/ext_power.md
+[flashing tutorial]: ../../tutorial/flashing_firmware/ext_power.md
 [T420 / T520 / X220 / T420s / W520 common]: Sandy_Bridge_series.md

Documentation/mainboard/lenovo/x230s.md

@@ -16,4 +16,4 @@ is located at the circled place.
 
 Unlike [most Ivy Bridge ThinkPads](Ivy_Bridge_series.md), X230s has a single 16MiB SPI flash chip.
 
-The general [flashing tutorial](../../flash_tutorial/index.md) has more details.
+The general [flashing tutorial](../../tutorial/flashing_firmware/index.md) has more details.

Documentation/mainboard/lenovo/x301.md

@@ -43,5 +43,5 @@ Tested:
   Linux payload (Heads) and SeaBIOS.
 
 
-[flashing tutorial]: ../../flash_tutorial/ext_power.md
+[flashing tutorial]: ../../tutorial/flashing_firmware/ext_power.md