rxrpc: Fix duplicate const

Remove a duplicate const keyword.

Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index d38dffd..4954e6e2 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -777,7 +777,7 @@
 extern const char rxrpc_congest_changes[rxrpc_congest__nr_change][9];
 
 extern const char *const rxrpc_pkts[];
-extern const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4];
+extern const char rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4];
 
 #include <trace/events/rxrpc.h>
 
diff --git a/net/rxrpc/misc.c b/net/rxrpc/misc.c
index 9d1c721..804a88e 100644
--- a/net/rxrpc/misc.c
+++ b/net/rxrpc/misc.c
@@ -96,7 +96,7 @@
 	[RXRPC_ACK_PING]		= 9,
 };
 
-const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4] = {
+const char rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4] = {
 	"---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY",
 	"IDL", "-?-"
 };