manta: Use better mount options

Change-Id: I895b7800c5becde37b22c29e16ad49123f9aad7a
manta: Enable libm optimizations

Change-Id: I89d4a6c0b6b5c4306f6348e7f18f649d1648c779

Conflicts:
	BoardConfig.mk
manta: power: Update cpufreq options

 * Enable sync_freq and notify_on_migrate

Change-Id: Ida27bfe84d3e7e6eecb4565192fe2c9bfb1469aa
manta: Enable translucent UI

 * Performance is fine on CM

Change-Id: Ie4f8754039ba7bb06c73f8a5a71166b20c9e0cf1
manta: Adjust scaling params

Change-Id: I43994c439f4b1af4b532de3e2b521e9cf44448c7
Cleanup