d2att: merge updates from upstream
Squashed commit of the following:

commit 616b3fa3d6b472fe9ec75dc181cb8c0300f51f83
Author: Dan Pasanen <dan.pasanen@gmail.com>
Date:   Tue Dec 3 08:17:02 2013 -0600

    add I747MVLUEMK5 as valid bootloader

    Change-Id: Ibf67fbc0821352d8ea03093dd19f83951c394e93

commit 1e2b7db9d2549c5c29d093943b89cd5f6eb18b64
Author: Dave Daynard <nardholio@gmail.com>
Date:   Sat Nov 30 07:30:12 2013 -0500

    Add I747UCUEMJ2 as an allowed bootloader

    Change-Id: Id0f244796f9d8adb16b7c5e6fe2f90736f08583e

commit 0401a7a706a02d3957350ecd1b6c2e82873e4b3a
Author: Dan Pasanen <dan.pasanen@gmail.com>
Date:   Thu Nov 28 07:54:53 2013 -0600

    d2att: add I747UCUEMJB as valid bootloader

    Change-Id: I2f48ec5e8edead164a03ddbac9c839844ea3c50a

commit dcbcf46947fa9a2cb0ab2bde208bbdb2fa628785
Author: Dan Pasanen <dan.pasanen@gmail.com>
Date:   Mon Oct 28 21:27:43 2013 -0500

    d2att: remove gsm.mk

    Change-Id: I4919eb52831dd2ede53c66a0a85a225ad22541e9

Conflicts:
	board-info.txt

Change-Id: Iab5dc37837d15301d57ceefd21516bfa0c3bc5e6