When a ROSE node was deleted, node number was not
decremented and addr kept going up when a new node
was added.

/proc/net/rose_neigh
addr  callsign  dev  count use mode restart  t0  tf digipeaters
00007 F5KBW-9   ax0      1   0  DTE      no   0   0
00006 F6BVP-11  ax0      2   0  DTE      no   0   0
00005 F6BVP-9   ax0      2   0  DTE      no   0   0
00001 RSLOOP-0  ???      0   0  DCE     yes   0   0

With this patch, rose node number is correctly decreased
when nodes are deleted and new ones added :

/proc/net/rose_neigh
addr  callsign  dev  count use mode restart  t0  tf digipeaters
00004 F5KBW-9   ax0      1   0  DTE      no   0   0
00003 F6BVP-11  ax0      2   0  DTE      no   0   0
00002 F6BVP-9   ax0      2   0  DTE      no   0   0
00001 RSLOOP-0  ???      0   0  DCE     yes   0   0

Signed-off-by: Bernard Pidoux <redacted>