board-nooktablet.c: updated pixel_clock to 60hz
How to calculate pixel clock,
horizontal total pixels = x_res + hfp + hsw + hbp = 1354
vertical total pixels = y_res + vfp + vsw + vbp = 635
total pixels = 859790
to get 60hz pixel clock = (859790 * 60)/1000 = 51587.4board-nooktablet.c: updated pixel_clock to 60hz
cpuidle44xx.c: reverted to omapzoom, again
omap2plus-cpufreq.c: revert tansition latency