staging: comedi: removing not useful `else` after return

Signed-off-by: Kinka Huang <kinkabrain@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/comedi/comedi.h
Simple merge

diff --cc drivers/staging/comedi/comedi_fops.c
Simple merge

diff --cc drivers/staging/comedi/comedidev.h
Simple merge