ledDriver: Fix off-by-two error in framebuffer

For some reason, the framebuffer starts off on pixel 2.  To get around
this, simply start writing to the framebuffer on pixel 2.
ledDriver: Fix white flash on reset

We initialize the dma buffer so that, while we still drop the first two
pixels during initialization, they no longer flash bright white, instead
flasing all black.
main: Move framebuffer definition to top of file

This collects static variables together at the top of the file.