imx: hab: Use CONFIG_SPL_LOAD_FIT_ADDRESS in the CSF example

The SPL authenticates image starting from CONFIG_SPL_LOAD_FIT_ADDRESS
address, update the csf_fit.txt to match.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/doc/imx/habv4/csf_examples/mx8m/csf_fit.txt b/doc/imx/habv4/csf_examples/mx8m/csf_fit.txt
index 3d79edf..97f3eea 100644
--- a/doc/imx/habv4/csf_examples/mx8m/csf_fit.txt
+++ b/doc/imx/habv4/csf_examples/mx8m/csf_fit.txt
@@ -27,4 +27,4 @@
   Verification index = 2
   # FIXME:
   # Line 1 -- fitImage
-  Blocks = 0x401fcdc0 0x57c00 0xffff "flash.bin"
+  Blocks = CONFIG_SPL_LOAD_FIT_ADDRESS 0x57c00 0xffff "flash.bin"