Add defconfig for Boundary Devices A board

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Merge branch 'boundary-imx_3.0.35_4.1.0' of github.com:boundarydevices/linux-imx6 into boundary-imx_3.0.35_4.1.0
a_defconfig: Boundary A board has no WLAN, use ASIX built-in

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
a: allow LEDs to be accessed from userspace

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
a_defconfig: use built-in drivers, not modules. Add PCIE

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