Improvement for EDID debugging
Patch for EDID in case preferred timing is read from basic EDID block.
Patch for find the best video mode using all nine cases (formerly only
two cases are recognized).
Add some defines to prevent compilation errors in case of wifi is
deactivated.
Add some export directives to prevent compilation errors in some cases
where usb is used as module.
Fix the mcs7830 alignment bug with two possible patches, Filippo_G's and
gen2thomas's. Both are configurable via .config.
Merge pull request #17 from gen2thomas/master

EDID: improved debugging and 2 patches