linux-boundary: move nitrogen6x defconfig to machine dir

The move is necessary to add support for the nitrogen6x-lite board.

Change-Id: I146e2a871b4e73f581cadd536ec03452a3756b2f
Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
Tested-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Eric Nelson <eric.nelson@boundarydevices.com>
linux-boundary: add nitrogen6x-lite defconfig

Change-Id: I18df1af1199cf3d8ec2568799800b19215eb4bb0
Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
nitrogen6x-lite: add machine definition

The board support has taken into account the following main features
of the board:

 * Freescale i.MX6 Solo Processor ARM Cortex A9 @ 1GHz
 * 512 MB DDR3 (expandable to 1GB)
 * microSD slot
 * 2MB Serial Flash
 * 802.11 a/b/g/n + BT4.0 via Optional Daughter Card

Change-Id: I02735b67d04ceae78a55905e26edd82f609da59e
Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
nitrogen6x-lite: Add Broadcom firmware

The Nitrogen6-Lite board supports Wi-fi with a daughterboard
with the Broadcom 4330 ABGN chip.

This patch adds the driver, firmware, and calibration (nvram)
files to the build using the broadcom-nvram-config recipe.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>