[avr-libc-dev] Update RFR devices header files

[Pitchumani Sivanupandi]

RFR devices (mega64/644/128/1284/256/2564rfr2) headers are included in
the revision 2308.
http://svn.savannah.nongnu.org/viewvc?view=rev&root=avr-libc&revision=2308

It seems they are in struct-based format like xmega headers. Usually
tiny and mega headers are in non struct-based format. Atmel published
headers for these RFR devices are updated. I have attached a patch that
updates the RFR devices header as per latest headers from Atmel. Is that
ok?

Regards,
Pitchumani

rfr-headers-diff.patch
Description: Text document