MPC85xx: TQM8548: add support for the TQM8548_BE module

The TQM8548_BE is a variant of the TQM8548 module with NAND and CAN
interface. With NAND support, the image is significantly larger and
TEXT_BASE is adjusted accordingly. U-Boot can be built for this
module with "$ make TQM8548_BE_config".

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
diff --git a/board/tqc/tqm85xx/config.mk b/board/tqc/tqm85xx/config.mk
index 52e84ad..37b7b23 100644
--- a/board/tqc/tqm85xx/config.mk
+++ b/board/tqc/tqm85xx/config.mk
@@ -23,7 +23,9 @@
 
 #
 # tqm85xx board
-# default CCARBAR is at 0xff700000
-# assume U-Boot is less than 256k
 #
+ifeq ($(CONFIG_TQM8548_BE),y)
+TEXT_BASE = 0xfff80000
+else
 TEXT_BASE = 0xfffc0000
+endif