ppc4xx: Fix building of sc3 board

Update image size after addition of new environment handling.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/sc3/config.mk b/board/sc3/config.mk
index 1bdf5e4..a46b197 100644
--- a/board/sc3/config.mk
+++ b/board/sc3/config.mk
@@ -21,4 +21,4 @@
 # MA 02111-1307 USA
 #
 
-TEXT_BASE = 0xFFFC0000
+TEXT_BASE = 0xFFFA0000