Edison - ReadPixel/Rect Perf ILI9341

redid readPixel, readRect, writeRect to make it not quite so slow

Also some perf work with the  setAddr to do one spi write for the 2 Xs
like wise the 2Ys to cut down on calls to driver.  Also changed
functions for setting CS or DC high or low to see if already that before
calling again as to again minimize call to driver