ppc4xx: Fix building of PMC440 board

Update image size and default environment
after addition of new environment handling.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/esd/pmc440/config.mk b/board/esd/pmc440/config.mk
index 91e65ec..6e9f735 100644
--- a/board/esd/pmc440/config.mk
+++ b/board/esd/pmc440/config.mk
@@ -23,7 +23,7 @@
 sinclude $(OBJTREE)/board/$(BOARDDIR)/config.tmp
 
 ifndef TEXT_BASE
-TEXT_BASE = 0xFFFA0000
+TEXT_BASE = 0xFFF90000
 endif
 
 PLATFORM_CPPFLAGS += -DCONFIG_440=1