=== DF-4931 fix apply (rv740_dpm.c) ===
Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|--- a/sys/dev/drm/radeon/rv740_dpm.c
|+++ b/sys/dev/drm/radeon/rv740_dpm.c
--------------------------
Patching file sys/dev/drm/radeon/rv740_dpm.c using Plan A...
Hunk #1 succeeded at 163.
Hunk #2 succeeded at 257.
done

MD5 (sys/dev/drm/radeon/rv740_dpm.c) = 3892509a4dee23072ec4bd42e5a68b72
(patched — this md5 state is what radeon_module_build.log compiled)
REBUILD_RC=0
-rw-r--r--  1 root  wheel  2030888 Sep 25 06:33 /usr/obj/usr/src/sys/dev/drm/radeon/radeon.ko
=== revert ===
MD5 (/usr/src/sys/dev/drm/radeon/rv740_dpm.c) = 98e600ce6e9b55011b16e2fe5a0302d8
       0