Change all '$(...)' variable references into '${...}'
which makes the environment compatible with the hush shell.
WARNING: Support for the old '$(...)' syntax will be
discontinued in a later version.
diff --git a/board/siemens/common/README b/board/siemens/common/README
index d781903..7f1c8cd 100644
--- a/board/siemens/common/README
+++ b/board/siemens/common/README
@@ -19,7 +19,7 @@
 geben werden:
 
   => printenv addmtd
-  addmtd=setenv bootargs $(bootargs)
+  addmtd=setenv bootargs ${bootargs}
     mtdparts=0:256k(U-Boot)ro,768k(Kernel),-(Rest)\;1:-(myJFFS2)
 
 Die Portierung auf SMC ist natuerlich noch nicht getestet.