camera: Fix preview on SEMC msm7x30 devices

Change-Id: I32adcfa22d8f2c35720a223120867b0b6dfaf2e1
Workaround for Xperia 2011 camera framerate

Make video encoding less cpu intensive by using the camera recording
buffer as input for the encoder, no more copying to temporary adsp buffer.

Now getting 28 fps with stabilization on, and 29.5 fps with stabilization off.

Credits: miniuser123@xda

Change-Id: I845677f139d6ab539eaeaacdf3befb731d86d74e