doc: fix file extension for flattened image tree blob

Different sections in the document suggest flattened image tree blob
files have a file name extension of .itb. Fix the list of file extensions
to reflect that.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>

diff --git a/doc/uImage.FIT/source_file_format.txt b/doc/uImage.FIT/source_file_format.txt
index 3db068d6c8169c09abc6fc52f17409fada76135a..9c527c3e012d9dd3a41aa27727e696a7446f10e8 100644 (file)
--- a/doc/uImage.FIT/source_file_format.txt
+++ b/doc/uImage.FIT/source_file_format.txt
@@ -56,7 +56,7 @@ FIT is formally a flattened device tree (in the libfdt meaning), which
 conforms to bindings defined in this document.
 
 .its   - image tree source
-.fit   - flattened image tree blob
+.itb   - flattened image tree blob
 
 c) Image building procedure