Staging: rts5208: fix CHANGE_LINK_STATE value

Fix CHANGE_LINK_STATE value when card_exist is true.

Fixes: a9b693cd ("Staging: rts5208: helper function to manage delink states")
Signed-off-by: Fabio Falzoi <fabio.falzoi84@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>