[PATCH v2] scripts/make_fit: Drop fdt image entry compatible string

[Chen-Yu Tsai]

According to the FIT image source file format document found in U-boot [1]
and the split-out FIT image specification [2], under "'/images' node" ->
"Conditionally mandatory property", the "compatible" property is described
as "compatible method for loading image", i.e., not the compatible string
embedded in the FDT or used for matching.

Drop the compatible string from the fdt image entry node.

While at it also fix up a typo in the document section of output_dtb.

[1] U-boot source "doc/usage/fit/source_file_format.rst", or on the website:
    https://docs.u-boot.org/en/latest/usage/fit/source_file_format.html
[2] https://github.com/open-source-firmware/flat-image-tree/blob/main/source/chapter2-source-file-format.rst

Fixes: 7a23b027ec17 ("arm64: boot: Support Flat Image Tree")
Signed-off-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
---
Changes since v1:
- Add clear reference to U-boot docs along with excerpt
- Send separately from "disable compression for DTBs" patch

 scripts/make_fit.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/scripts/make_fit.py b/scripts/make_fit.py
index 3de90c5a094b..263147df80a4 100755
--- a/scripts/make_fit.py
+++ b/scripts/make_fit.py
@@ -190,7 +190,7 @@ def output_dtb(fsw, seq, fname, arch, compress):
     Args:
         fsw (libfdt.FdtSw): Object to use for writing
         seq (int): Sequence number (1 for first)
-        fmame (str): Filename containing the DTB
+        fname (str): Filename containing the DTB
         arch: FIT architecture, e.g. 'arm64'
         compress (str): Compressed algorithm, e.g. 'gzip'
 
@@ -211,7 +211,6 @@ def output_dtb(fsw, seq, fname, arch, compress):
         fsw.property_string('type', 'flat_dt')
         fsw.property_string('arch', arch)
         fsw.property_string('compression', compress)
-        fsw.property('compatible', bytes(compat))
 
         with open(fname, 'rb') as inf:
             compressed = compress_data(inf, compress)
-- 
2.45.1.288.g0e0cd299f1-goog