bug #30438 efuse bits written as 0 on at90pwmxx parts
* avrdude.conf.in: (pwm2, pwm2b, pwm3, pwm3b) <efuse.write>: Write
eight bits
* avrdude.conf.in: made part parents (pwm3 = pwm2, pwm3b = pwm2b,
pwm2b = pwm2 + different signature)
* ChangeLog-2011: New file, rotate ChangeLog for new year.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1032 81a1dc3b-b13d-400b-aceb-764788c761c2