IPIPE - anonated - 07-04

1. Grab interrups: interrpt.S

In __common_int_entry:

#ifdef CONFIG_IPIPE
call ___ipipe_grab_irq
SP += 12;
cc = r0 == 0;
if cc jump common_restore_context;
#else /* CONFIG_IPIPE */
call _do_irq;
SP += 12;