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/include/configs/AMX860.h b/include/configs/AMX860.h
index c23fcc7..14d56bf 100644
--- a/include/configs/AMX860.h
+++ b/include/configs/AMX860.h
@@ -55,8 +55,8 @@
 
 #define CONFIG_BOOTCOMMAND							\
 	"bootp;"								\
-	"setenv bootargs root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) "	\
-	"ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off;"	\
+	"setenv bootargs root=/dev/nfs rw nfsroot=${serverip}:${rootpath} "	\
+	"ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off;"	\
 	"bootm"				/* autoboot command */
 
 #undef CONFIG_BOOTARGS