ipq806x: drop partitial supported boards

There are only artifacts for these boards in our tree and not even
partial support.

Drop teh stale files.

Signed-off-by: Mathias Kresin <dev@kresin.me>

diff --git a/board-nbg6617.bin b/board-nbg6617.bin
deleted file mode 100644 (file)
index ab4d43e..0000000
Binary files a/board-nbg6617.bin and /dev/null differ

diff --git a/board-rt-ac58u.bin b/board-rt-ac58u.bin
deleted file mode 100644 (file)
index 379bdc8..0000000
Binary files a/board-rt-ac58u.bin and /dev/null differ