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/doc/README.Sandpoint8240 b/doc/README.Sandpoint8240
index b506c01..a41b69a 100644
--- a/doc/README.Sandpoint8240
+++ b/doc/README.Sandpoint8240
@@ -253,7 +253,7 @@
 hostname=sp1
 ethaddr=00:03:47:97:E4:6B
 load=tftp 100000 u-boot.bin
-update=protect off all;era FFF00000 FFF3FFFF;cp.b 100000 FFF00000 $(filesize);saveenv
+update=protect off all;era FFF00000 FFF3FFFF;cp.b 100000 FFF00000 ${filesize};saveenv
 filesize=1f304
 gatewayip=145.17.228.1
 netmask=255.255.255.0
@@ -308,7 +308,7 @@
 You can put these commands into some environment variables;
 
 => setenv load tftp 100000 u-boot.bin
-=> setenv update protect off all\;era FFF00000 FFF3FFFF\;cp.b 100000 FFF00000 \$(filesize)\;saveenv
+=> setenv update protect off all\;era FFF00000 FFF3FFFF\;cp.b 100000 FFF00000 \${filesize}\;saveenv
 => saveenv
 
 Then you just have to type "run load" then "run update"
diff --git a/doc/README.dk1s10 b/doc/README.dk1s10
index bb8375a..622bef5 100644
--- a/doc/README.dk1s10
+++ b/doc/README.dk1s10
@@ -118,11 +118,11 @@
 
    at the Altera Standard 32 to SRAM:
 
-	==> cp.b 800000 40000 $(filesize)
+	==> cp.b 800000 40000 ${filesize}
 
    at the Microtronix LDK 2.0 to SDRAM:
 
-	==> cp.b 1010000 8000000 $(filesize)
+	==> cp.b 1010000 8000000 ${filesize}
 
 U-Boot will now automatically start when the board is powered on or
 reset using the Standard-32 configuration. To start U-Boot with the