ppc4xx: Update PMC405 board support

This patch prepares the good old PMC405 board support for
upcoming PMC405V2 patches.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/esd/pmc405/config.mk b/board/esd/pmc405/config.mk
index fc2794d..5a3fc4b 100644
--- a/board/esd/pmc405/config.mk
+++ b/board/esd/pmc405/config.mk
@@ -21,8 +21,4 @@
 # MA 02111-1307 USA
 #
 
-#
-# esd PMC405 boards
-#
-
-TEXT_BASE = 0xFFFC0000
+TEXT_BASE = 0xFFF80000