Remove deprecated 'autoscr' command/variables

The more standard 'source' command provides identical functionality to
the autoscr command.

Environment variable names/values on the MVBC_P, MVBML7, kmeter1,
mgcoge, and km8xx boards are updated to no longer refernce 'autoscr'.

The 'autoscript' and 'autoscript_uname' environment variables are
also removed.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Acked-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Acked-by: Heiko Schocher <hs@denx.de>
diff --git a/doc/README.IPHASE4539 b/doc/README.IPHASE4539
index defad30..b804e06 100644
--- a/doc/README.IPHASE4539
+++ b/doc/README.IPHASE4539
@@ -54,7 +54,6 @@
 
 ------------------------------------------------------------------------------
 => help
-autoscr - run script from memory
 base    - print or set address offset
 bdinfo  - print Board Info structure
 bootm   - boot application image from memory
@@ -88,6 +87,7 @@
 saveenv - save environment variables to persistent storage
 setenv  - set environment variables
 sleep   - delay execution for some time
+source  - run script from memory
 tftpboot- boot image via network using TFTP protocol
 	       and env variables ipaddr and serverip
 version - print monitor version