Allow override of DUN settings

Allow override of system DUN settings by setting
persist.sys.dun.override
to one of the following values:
2 = not set, 0 = DUN not required, 1 = DUN required
If the prop is not set or is set to an invalid value the system setting
will be used.

Change-Id: I55066334d66ce24a485fbbb2cc1e6450c1025507
multi-carrier overlays: Add eri and config for US Cellular

Change-Id: I112716f94eb9fe7509845689688fcea13da361f7
add more vzw eri's

Change-Id: I8a299ad5d727dd084eb173aeb040c165bb556f51
init: add cpufreq settings

Change-Id: I5d47528e949335c0b277806a215fce159b2dc5dc
Signed-off-by: houst0nn <houstonn@gmail.com>
Update prebuilt su

v1.93

Signed-off-by: Andre Saddler <dresadd09691@gmail.com>