manta: Use better mount options

Change-Id: I895b7800c5becde37b22c29e16ad49123f9aad7a
(cherry picked from commit 5b81848fd7dda12ae08a1e4078739a5b2e014c0b)
manta: Enable libm optimizations

Change-Id: I89d4a6c0b6b5c4306f6348e7f18f649d1648c779
(cherry picked from commit 62bf9b0068d9c695dcee512e3b63bdacab74a5f1)
manta: power: Update cpufreq options

 * Enable sync_freq and notify_on_migrate

Change-Id: Ida27bfe84d3e7e6eecb4565192fe2c9bfb1469aa
(cherry picked from commit 835e8e35777fbc9a8ae426213272ef1410613676)