mb/elmex/pcm205401: Add comment about the code

It's not missing, it's just not where one expects it to be.

Change-Id: I377b68cbdc9266048074dc326490750777a6fbf5
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43291
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/elmex/pcm205401/Kconfig

@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
+# The code for this board is under elmex/pcm205400
+
 if BOARD_ELMEX_PCM205401
 
 config MAINBOARD_PART_NUMBER

src/mainboard/elmex/pcm205401/Kconfig.name

@@ -1,2 +1,4 @@
+# The code for this board is under elmex/pcm205400
+
 config BOARD_ELMEX_PCM205401
 	bool "pcm205401"