obmc-console: Fix readability-else-after-return

```
/usr/bin/clang-tidy -checks=-*, readability-else-after-return -export-fixes /tmp/tmpzmyw6on0/tmpdk8wt96i.yaml -p=build /mnt/host/andrew/home/andrew/src/openbmc/obmc-console/test/test-ringbuffer-boundary-poll.c
/mnt/host/andrew/home/andrew/src/openbmc/obmc-console/build/../ringbuffer.c:131:4: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
        } else {
          ^~~~~~
```

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Ic80538a64f061f9ed3d3d71293dcf4f3d99cb6e4
diff --git a/socket-handler.c b/socket-handler.c
index d05fec3..f37dcb8 100644
--- a/socket-handler.c
+++ b/socket-handler.c
@@ -271,9 +271,8 @@
 		if (rc < 0) {
 			if (errno == EAGAIN || errno == EWOULDBLOCK) {
 				return POLLER_OK;
-			} else {
-				goto err_close;
 			}
+			goto err_close;
 		}
 		if (rc == 0) {
 			goto err_close;