* Contributors: Added Alexis Berlemont and Simone Mannori.

* Contributors: Added Alexis Berlemont and Simone Mannori.
* Makefile.am: Fix depmod call on "make install".
* comedi/rt.c: (comedi_request_irq), (comedi_free_irq),
(comedi_switch_to_rt), (comedi_switch_to_non_rt),
(handle_void_irq), (comedi_rt_get_irq), (fusion_handle_irq),
(comedi_rt_release_irq), (comedi_rt_init), (comedi_rt_cleanup),
(handle_rtl_irq): rtai fusion support from Alexis Berlemont,
plus some cleanups by me.
* comedi/rt_pend_tq.c: (rt_pend_call), (rt_pend_tq_init),
(rt_pend_tq_cleanup): rtai fusion support from Alexis Berlemont.
* include/linux/comedi_rt.h: Implemented comedi_spinlock_irqsave()
and comedi_spinlock_irqrestore for rtai fusion.
* m4/rtai.m4: rtai fusion support from Alexis Berlemont.