lima: Print usage if --help is any of the arguments.

Fix defect reported by Coverity Scan.

Structurally dead code (UNREACHABLE)
unreachable: Since the loop increment n++; is unreachable, the loop body
will never execute more than once.

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6906>

src/gallium/drivers/lima/standalone/lima_disasm.c

@@ -163,8 +163,6 @@ main(int argc, char **argv)
          print_usage();
          return 1;
       }
-
-      break;
    }
 
    char *filename = NULL;