rxrpc: Static arrays of strings should be const char *const[]

Static arrays of strings should be const char *const[].

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 24126d9..eeb829e 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -637,7 +637,7 @@
 extern unsigned int rxrpc_rx_mtu;
 extern unsigned int rxrpc_rx_jumbo_max;
 
-extern const char *rxrpc_pkts[];
+extern const char *const rxrpc_pkts[];
 extern const s8 rxrpc_ack_priority[];
 
 extern const char *rxrpc_acks(u8 reason);