This patch suppresses the messages batman writes to
the kernel log when gw_mode is changed. This is done
to avoid spamming the log with negligible messages
when gw_mode is switched frequently.

Fixes: #93

Signed-off-by: Fabian Bläse <[email protected]>
Reviewed-by: Adrian Schmutzler <[email protected]>
Reviewed-by: Robert Langhammer <[email protected]>
Reviewed-by: Tim Niemeyer <[email protected]>
Tested-by: Adrian Schmutzler <[email protected]>