batman-adv: Add BATADV_DBG_TP_METER to BATADV_DBG_ALL

The BATADV_DBG_ALL has to contain the bit of BATADV_DBG_TP_METER to really
support all available debug messages.

Fixes: 33a3bb4a

 ("batman-adv: throughput meter implementation")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>