um: remove a stray tab

Static checkers would urge us to add curly braces to this code, but
actually the code works correctly.  It just isn't indented right.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

Author: Dan Carpenter

arch/x86/um/os-Linux/tls.c

@@ -37,7 +37,7 @@ void check_host_supports_tls(int *supports_tls, int *tls_min)
 				continue;
 			else if (errno == ENOSYS)
 				*supports_tls = 0;
-				return;
+			return;
 		}
 	}