[ppc4xx] Fix problem with NAND booting on AMCC Acadia

The latest changes showed a problem with the location of the NAND-SPL
image in the OCM and the init-data area (incl. cache). This patch
fixes this problem.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/nand_spl/board/amcc/acadia/config.mk b/nand_spl/board/amcc/acadia/config.mk
index 55069b4..3b140fa 100644
--- a/nand_spl/board/amcc/acadia/config.mk
+++ b/nand_spl/board/amcc/acadia/config.mk
@@ -32,11 +32,11 @@
 # We will copy this SPL into internal SRAM in start.S. So we set
 # TEXT_BASE to starting address in internal SRAM here.
 #
-TEXT_BASE = 0xF8003000
+TEXT_BASE = 0xf8004000
 
 # PAD_TO used to generate a 16kByte binary needed for the combined image
 # -> PAD_TO = TEXT_BASE + 0x4000
-PAD_TO	= 0xF8007000
+PAD_TO	= 0xf8008000
 
 ifeq ($(debug),1)
 PLATFORM_CPPFLAGS += -DDEBUG