m4: fix device dependencies
m4: set correct device DPI
m4: update copyright, remove unneeded file copy
m4: don't use AXI_BRIDGE_LOCK, nor BCM4335 prepatch
m4: update overlay
m4: remove ATT-specific APN config
m4: remove unneeded snd_soc_msm configs

* msm8930 uses Sitar config
m4: remove unnecessary AVRCP keylayout
m4: use regular xhdpi dalvik config
m4: add BTLE permissions, remove NFC defines
m4: add media profile
m4: reorganize boardconfig
m4: update proprietary files list
m4: update ramdisk
m4: remove audioamp temporarily
m4: add ext4 partition_type flag for recovery

Change-Id: I5c89f7fd6e36c4879f04e72b9d05ff21d966b2bc