Change all '$(...)' variable references into '${...}'
which makes the environment compatible with the hush shell.
WARNING: Support for the old '$(...)' syntax will be
discontinued in a later version.
diff --git a/include/configs/csb272.h b/include/configs/csb272.h
index b4453b1..27d64c1 100644
--- a/include/configs/csb272.h
+++ b/include/configs/csb272.h
@@ -58,7 +58,7 @@
 #define CONFIG_BOOTCOMMAND \
 	"setenv bootargs console=ttyS0,38400 debug " \
 	"root=/dev/ram rw ramdisk_size=4096 " \
-	"ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off; " \
+	"ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; " \
 	"bootm fe000000 fe100000"
 #endif
 
@@ -67,8 +67,8 @@
 #define CONFIG_BOOTCOMMAND \
 	"bootp; " \
 	"setenv bootargs console=ttyS0,38400 debug " \
-	"root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) " \
-	"ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off; " \
+	"root=/dev/nfs rw nfsroot=${serverip}:${rootpath} " \
+	"ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; " \
 	"bootm"
 #endif