softpll.c: aligns the aux channel with the reference clock when locking is completed, little optimization in dmpll_irq()

Otherwise unexpected roll-over onto the next handler will happen.

It's only 1k.

When linked against debug.S, which provides this symbol, this will setup debugging.
If not linked against debug.S the symbol will be the same as _reset_handler.

Conflicts:
	wrc_main.c