mb/amd/padmelon: rename to pademelon

This AMD reference board is called Pademelon and not Padmelon, so fix
the name in coreboot. Also update the corresponding documentation.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Id1c7331f5f3c34dc7ec4bc5a1f5fe3d12d503474
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68426
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

Documentation/mainboard/amd/pademelon/pademelon.md

@@ -0,0 +1,80 @@
+# Pademelon board
+
+## Specs (with Merlin Falcon SOC)
+
+* Two 260-pin DDR4 SO-DIMM slots, 1.2V DDR4-1333/1600/1866/2133 SO-DIMMs
+  Supports 4GB, 8GB and 16GB DDR4 unbuffered ECC (Merlin Falcon)SO-DIMMs
+* Can use Prairie Falcon, Brown Falcon, Merlin Falcon, though coreboot
+  code is specific for Merlin Falcon SOC. Some specs will change if not
+  using Merlin Falcon.
+* One half mini PCI-Express slot on back side of mainboard
+* One PCI Express® 3.0 x8 slot
+* Two SATA3 ports with 6Gb/s data transfer rate
+* Two USB 2.0 ports at rear panel
+* Two USB 3.0 ports at rear panel
+* Dual Gigabit Ethernet from Realtek RTL8111F Gigabit controller
+* 6-channel High-Definition audio from Realtek ALC662 codec
+* One soldered down SPI flash with dediprog header
+
+## Mainboard
+
+![mainboard][pademelon]
+
+Three items are marked in this picture
+1. dediprog header
+2. memory dimms, address 0xA0 and 0xA4
+3. SATA cables connected to motherboard
+
+## Back panel
+
+![back panel][pademelon_io]
+
+* The lower serial port is UART A (debug serial)
+
+## Flashing coreboot
+
+```eval_rst
++---------------------+--------------------+
+| Type                | Value              |
++=====================+====================+
+| Socketed flash      | no                 |
++---------------------+--------------------+
+| Model               | Macronix MX256435E |
++---------------------+--------------------+
+| Size                | 8 MiB              |
++---------------------+--------------------+
+| Flash programming   | dediprog header    |
++---------------------+--------------------+
+| Package             | SOIC-8             |
++---------------------+--------------------+
+| Write protection    | No                 |
++---------------------+--------------------+
+```
+
+## Technology
+
+```eval_rst
++---------------+------------------------------+
+| Fan control   | Using fintek F81803A         |
++---------------+------------------------------+
+| CPU           | Merlin Falcon (see reference)|
++---------------+------------------------------+
+```
+
+## Description of pictures within this document
+
+```eval_rst
++----------------------------+----------------------------------------+
+|pademelon.jpg               | Motherboard with components identified |
++----------------------------+----------------------------------------+
+|pademelon_io.jpg            | Back panel picture                     |
++----------------------------+----------------------------------------+
+```
+
+## Reference
+
+[Merlin Falcon BKDG][merlinfalcon]
+
+[merlinfalcon]: ../../../soc/amd/family15h.md
+[pademelon]: pademelon.jpg
+[pademelon_io]: pademelon_io.jpg