updates for I747UCDMG2

Change-Id: Ia8d7d7c46c792b3e624c811934cec0b109028518
d2att: remove gsm.mk

Change-Id: I4919eb52831dd2ede53c66a0a85a225ad22541e9
d2att: add I747UCUEMJB as valid bootloader

Change-Id: I2f48ec5e8edead164a03ddbac9c839844ea3c50a
Add I747UCUEMJ2 as an allowed bootloader

Change-Id: Id0f244796f9d8adb16b7c5e6fe2f90736f08583e
add I747MVLUEMK5 as valid bootloader

Change-Id: Ibf67fbc0821352d8ea03093dd19f83951c394e93
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_device_samsung_d2att into HEAD

Conflicts:
	board-info.txt
	cm.mk

Change-Id: Ibc02b9e204362fd3e27c4a268bf1b29fa9801fea