[AFS]: Fix memory leak in SRXAFSCB_GetCapabilities

The interface array is not freed on exit.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 6685f4c..d5b2ad6 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -443,6 +443,7 @@
 			reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
 			reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
 		}
+		kfree(ifs);
 	}
 
 	reply.cap.capcount = htonl(1);