rxrpc: Fix duplicate const

Remove a duplicate const keyword.
Signed-off-by: David Howells <dhowells@redhat.com>

net/rxrpc/ar-internal.h

@@ -777,7 +777,7 @@ extern const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10];
 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>
 

net/rxrpc/misc.c

@@ -96,7 +96,7 @@ const s8 rxrpc_ack_priority[] = {
 	[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", "-?-"
 };