Revert "Bluetooth: qca: add support for WCN7850"

This reverts commit 67ffc334 which is
commit 67ffc334 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I62f7e652e6cd20291b5897431865e8a3ebbacb4d
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>