AVR32: Enable interrupts at bootup

The timer code depends on the timer interrupt to keep track of the
upper 32 bits of the cycle counter. This obviously doesn't work when
interrupts are disabled the whole time.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

lib_avr32/board.c

@@ -311,6 +311,8 @@ void board_init_r(gd_t *new_gd, ulong dest_addr)
 	dma_alloc_init();
 	board_init_info();
 
+	enable_interrupts();
+
 	bd->bi_flashstart = 0;
 	bd->bi_flashsize = 0;
 	bd->bi_flashoffset = 0;