broadcom-diag: add support for e3200 v1

Hex values in nvram seem to be uppercase on my e3200 device.

Define one power led and two buttons (reset/wps).

Signed-off-by: Tijs Van Buggenhout <tvb@able.be>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 35766