tracing/uprobe: Remove dead code in trace_uprobe_register()

In the function trace_uprobe_register(), the statement "return 0;"
out of switch case is dead code, remove it.

Link: https://lkml.kernel.org/r/1595561064-29186-1-git-send-email-fanpeng@loongson.cnSigned-off-by: Peng Fan <fanpeng@loongson.cn>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/trace_uprobe.c

@@ -1456,7 +1456,6 @@ trace_uprobe_register(struct trace_event_call *event, enum trace_reg type,
 	default:
 		return 0;
 	}
-	return 0;
 }
 
 static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs)