Merge patch series "finish using .dtso for overlay source files"

Rasmus Villemoes <rasmus.villemoes@prevas.dk> says:

This is a followup to the patches that landed in 2024.01 and nearly
made sure that source files for producing .dtbo files use the .dtso
extension. In the same release, a few new .dts files snuck in, and
there was also some test code involving .dtbo -> .dtbo.S -> .dtbo.o I
didn't really know how to handle at the time. This should finish the
job, bring us in sync with linux (at least in this respect), and drop
the .dts -> .dtbo build rule.

test/py/tests/test_efi_capsule/conftest.py

@@ -53,7 +53,7 @@ def efi_capsule_data(request, u_boot_config):
 
         # Update dtb to add the version information
         check_call('cd %s; '
-                   'cp %s/test/py/tests/test_efi_capsule/version.dts .'
+                   'cp %s/test/py/tests/test_efi_capsule/version.dtso .'
                    % (data_dir, u_boot_config.source_dir), shell=True)
 
         if capsule_auth_enabled:
@@ -61,13 +61,13 @@ def efi_capsule_data(request, u_boot_config):
                        'cp %s/arch/sandbox/dts/test.dtb test_sig.dtb'
                        % (data_dir, u_boot_config.build_dir), shell=True)
             check_call('cd %s; '
-                       'dtc -@ -I dts -O dtb -o version.dtbo version.dts; '
+                       'dtc -@ -I dts -O dtb -o version.dtbo version.dtso; '
                        'fdtoverlay -i test_sig.dtb '
                             '-o test_ver.dtb version.dtbo'
                        % (data_dir), shell=True)
         else:
             check_call('cd %s; '
-                       'dtc -@ -I dts -O dtb -o version.dtbo version.dts; '
+                       'dtc -@ -I dts -O dtb -o version.dtbo version.dtso; '
                        'fdtoverlay -i %s/arch/sandbox/dts/test.dtb '
                             '-o test_ver.dtb version.dtbo'
                        % (data_dir, u_boot_config.build_dir), shell=True)