rtl8187: Add termination packet to prevent stall

commit 2fcbab044a3faf4d4a6e269148dd1f188303b206 upstream.

The RTL8187 and RTL8187B devices can stall unless an explicit termination
packet is sent.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>