nitrogen53k: ensure camera is powered down
nitrogen53k: turn off tfp410
nitrogen53k: turn off LCD pins as only LVDS display is used

The doesn't help much from a power perspective, but will
lower emissions.
mxc_fec: allow board to turn phy on in fec_init, off in fec_halt
Nitrogen53k: new rev of board needs lower backlight pwm duty cycle
imx video: add IOMUX GPR2 mapping/width config variables
nitrogen53k: use 24 bit LVDS