net: mark read-only arrays as const

String literals are constant, and usually, we can also tag the array
of pointers const too, moving it to the .rodata section.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_stp.c

@@ -21,7 +21,7 @@
  */
 #define MESSAGE_AGE_INCR	((HZ < 256) ? 1 : (HZ/256))
 
-static const char *br_port_state_names[] = {
+static const char *const br_port_state_names[] = {
 	[BR_STATE_DISABLED] = "disabled",
 	[BR_STATE_LISTENING] = "listening",
 	[BR_STATE_LEARNING] = "learning",