[LinuxBIOS] PATCH: flashrom documentation fixes.

[Uwe Hermann]

Hi,

here's a small patch which fixes minor issues in the flashrom docs:

* Made the README, manpage, and ./flashrom -h output the same things
 * Added some missing options to the "usage:" one-liner
 * Aligned spaces in ./flashrom -h output
 * Added explicit license to the manpage (GPL).

HTH, Uwe.