m->offset from addr, JTAGICE3 doesn't need it anymore (similar
to JTAGICEmkII with 7+ firmware)
* jtag3.c (jtag3_read_byte): Allow for full-page reads of
EEPROM also for Xmega and debugWIRE, allow for signature
read in debugWIRE
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@1117 81a1dc3b-b13d-400b-aceb-764788c761c2