Using avr-gcc _delay_ms causes chip to freeze
For your CPU speed:

#define F_CPU 80000000UL

Do you have an extra 0 on there?  That reads 80 MHz.  I think you want 8 MHz.

EDIT: after checking the datasheet, your lfuse value looks to be OK if you're wanting to use the internal oscillator with CKDIV8 disabled.