nitrogen6x: use high-performance clock for PWM2 (MIPI needs it)

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
mxc_v4l2_capture: fix power off when closing device

    There is already a call to power_off_camera() in mxc_v4l_close(),
    so delete the call to vidioc_int_s_power(). This fixes a situation
    where the power is off but the driver thinks it is on still.

    This is essentially a cherry-pick/merge of these two commits
    from the non-Android branches:

	d90c9b1fb62094f623f0453a94ff1ef2d0d6dd56
	73d3e11a31ee2a14cb7a80c247b3ade3aca7db77

Signed-off-by: Philip Craig <phil@blackmoth.com.au>
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nitrogen6x: move MIPI control GP setup to mipi_pads

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>