staging: most: remove aim reset

This patch partly reverts a modification of function most_stop_channel()
that is trying to reset an established link between an AIM and an HDM in
all suitable places. But since the function most_stop_channel() is
stopping the data transfer it is the wrong place to do so.

Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>