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>

include/net/irda/ircomm_event.h

@@ -74,7 +74,7 @@ struct ircomm_info {
 	struct qos_info *qos;
 };
 
-extern char *ircomm_state[];
+extern const char *const ircomm_state[];
 
 struct ircomm_cb;   /* Forward decl. */