m7att: consolidate device proprietary files under m7-gsm

Change-Id: Ib42bdbd1fa26dd7f5afad5de3bb1e2e31fe3c5a3
m7att: remove GSM APN list

Change-Id: I020ca744c5604e13a237d394cffa667d09a9e4d8
Merge "m7att: consolidate device proprietary files under m7-gsm" into cm-10.2
merge CyanogenMod

Change-Id: Ie913fa4255ea92d195f7fb33a9bac08f454760e1