MLK-20935-3 doc: imx: ahab: Add a note in SRK Hash fuses sanity check

The commands included in introduction guide should not be used as
reference for programming the SRK Hash fuses as they are in big
endian.

Add a note to avoid a possible mistake.

Reported-by: Clement Le Marquis <clement.lemarquis@nxp.com>
Signed-off-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 137319826cc32d98a9b6890f35dd6670e104c2a5)
diff --git a/doc/imx/ahab/introduction_ahab.txt b/doc/imx/ahab/introduction_ahab.txt
index fe026ff..82ddec1 100644
--- a/doc/imx/ahab/introduction_ahab.txt
+++ b/doc/imx/ahab/introduction_ahab.txt
@@ -296,6 +296,9 @@
   46e34bf089780bd1c809e714a17e2f4e\
   SRK_1_2_3_4_table.bin
 
+NOTE: The commands above cannot be used as reference to program the SoC
+      SRK_HASH fuses.
+
 The SRK_1_2_3_4_table.bin and SRK_1_2_3_4_fuse.bin files can be used in further
 steps as explained in AHAB guides available under doc/imx/hab/ahab/guides/
 directory.