staging: vt6656: always call vnt_update_ifs on short time change.

short time change needs to synchronize parameters in vnt_update_ifs so
a call to the function is always necessary.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>