isdn/gigaset: handle Supplementary Service Listen

Add minimal handling for the non-optional CAPI FACILITY_REQ
Supplementary Service function Listen.

Impact: bugfix
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tilman Schmidt 2010-07-05 14:19:04 +00:00 • committed by David S. Miller
commit 18c2259c14