Install peripheral wifi firmware for picoimx

Call the wifi peripheral.mk to install the firmware
for bcm4339.

Change-Id: Ie38589388a08c4b2c3a68e2efc64c406f32ea207
Signed-off-by: Guoyin Chen <guoyin.chen@freescale.com>
Signed-off-by: Haoran Wang <Haoran.Wang@freescale.com>