update t480 documentation

the board is now officially supported by coreboot
fix references to t480 flashing instructions. before it pointed to t430.

Signed-off-by: gaspar-ilom <[email protected]>

Author: gaspar-ilom

blobs/xx80/README.md

@@ -31,7 +31,7 @@ The GBE MAC address was forged to: `00:DE:AD:C0:FF:EE MAC`
 ## tb.bin
 
 This blob was extracted from https://download.lenovo.com/pccbbs/mobiles/n24th13w.exe
-It is zero-padded to 1MB and should be flashed to the Thunderbolt SPI chip, which is not the same as the 16MB chip to which the heads rom is flashed. External flashing is recommended as the only way to reliably fix a bug in the original Thunderbolt software on the SPI chip. You can find a guide here: https://osresearch.net/T430-maximized-flashing/
+It is zero-padded to 1MB and should be flashed to the Thunderbolt SPI chip, which is not the same as the 16MB chip to which the heads rom is flashed. External flashing is recommended as the only way to reliably fix a bug in the original Thunderbolt software on the SPI chip. You can find a guide here: https://osresearch.net/T480-maximized-flashing/
 
 ## Integrity
 
@@ -50,4 +50,6 @@ See the board configs `boards/t480-[hotp-]maximized/t480-[hotp-]maximized.config
 # Documentation
 
 A guide on how to flash this board (both the Heads rom and the Thunderbolt `tb.bin` blob) can be found here:
-https://osresearch.net/T430-maximized-flashing/
+https://osresearch.net/T480-maximized-flashing/
+
+The upstream documentation is available here. It includes a list of known issues: https://doc.coreboot.org/mainboard/lenovo/t480.html

boards/EOL_t480-hotp-maximized/EOL_t480-hotp-maximized.config

@@ -16,7 +16,7 @@
 #   - It is zero-padded to 1MB and should be flashed to the Thunderbolt SPI chip,
 #     which is not the same as the 16MB chip to which the heads rom is flashed.
 #     External flashing is recommended as the only way to reliably fix a bug in the original Thunderbolt software on the SPI chip.
-#     You can find a guide here: https://osresearch.net/T430-maximized-flashing/
+#     You can find a guide here: https://osresearch.net/T480-maximized-flashing/
 #
 # - Includes Nitrokey/Librem Key HOTP Security dongle remote attestation (in addition to TOTP remote attestation through Qr Code)
 

boards/EOL_t480-maximized/EOL_t480-maximized.config

@@ -16,7 +16,7 @@
 #   - It is zero-padded to 1MB and should be flashed to the Thunderbolt SPI chip,
 #     which is not the same as the 16MB chip to which the heads rom is flashed.
 #     External flashing is recommended as the only way to reliably fix a bug in the original Thunderbolt software on the SPI chip.
-#     You can find a guide here: https://osresearch.net/T430-maximized-flashing/
+#     You can find a guide here: https://osresearch.net/T480-maximized-flashing/
 #
 # - DOES NOT INCLUDE Nitrokey/Librem Key HOTP Security dongle remote attestation (in addition to TOTP remote attestation through Qr Code)