Change BCM4339 wifi firmware position

Change firmware position.
Will pop warning info when not found
the firmware.

When build the images in root top the scripts will copy the
fw_bcmdhd.bin, fw_bcmdhd_apsta.bin bcmdhd.cal to the firmware folder.
Before test this please use
"$tools/bdk/brunch/brunch bsp download picoimx" to download firmware.
Bug:28537290

Change-Id: I400cbb8f4db450136d26a29c00503ac14128dc9e
Signed-off-by: Wang Haoran <Haoran.Wang@freescale.com>
2 files changed
tree: 200a805f1e77161213777026e9623c24ae38bc2c
  1. peripheral/