added code for interrupt handling and rpmsg parent device
identification.
 On branch dummy_lproc_rpmsg
 Changes to be committed:
	modified:   drivers/remoteproc/dummy_localproc.c
	modified:   drivers/remoteproc/dummy_remoteproc.c
	modified:   drivers/remoteproc/localproc_core.c
	modified:   drivers/remoteproc/remoteproc_core.c
	modified:   drivers/rpmsg/virtio_rpmsg_bus.c
	modified:   include/linux/remoteproc.h