remoteproc: fix kernel-doc warnings

remoteproc: fix kernel-doc warnings

Fix the following warnings when documentation is built:
drivers/remoteproc/remoteproc_virtio.c:330: warning: Function parameter
or member 'id' not described in 'rproc_add_virtio_dev'
drivers/remoteproc/remoteproc_core.c:243: warning: Function parameter
or member 'name' not described in 'rproc_find_carveout_by_name'
drivers/remoteproc/remoteproc_core.c:473: warning: Function parameter
or member 'offset' not described in 'rproc_handle_vdev'
drivers/remoteproc/remoteproc_core.c:604: warning: Function parameter
or member 'offset' not described in 'rproc_handle_trace'
drivers/remoteproc/remoteproc_core.c:678: warning: Function parameter
or member 'offset' not described in 'rproc_handle_devmem'
drivers/remoteproc/remoteproc_core.c:873: warning: Function parameter
or member 'offset' not described in 'rproc_handle_carveout'
drivers/remoteproc/remoteproc_core.c:1029: warning: cannot understand function
prototype: 'rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = '
drivers/remoteproc/remoteproc_core.c:1693: warning: Function parameter
or member 'work' not described in 'rproc_crash_handler_work'

Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20200212161956.10358-1-arnaud.pouliquen@st.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>