extension: openpower-pels: Replace deprecated libpldm header path

There are more OEMs than IBM contributing to libpldm, so the OEM headers
were restructured. Replace the deprecated IBM OEM header path with the
namespaced path.

The patch was generated by with the coccinelle[1] script from [2]:

```
$ spatch \
--sp-file .../libpldm/origin/evolutions/current/oem-ibm-header-compat.cocci \
--in-place \
$(git ls-files | grep -E '\.[ch](pp)?')
```

[1]: https://coccinelle.gitlabpages.inria.fr/website/
[2]: https://gerrit.openbmc.org/c/openbmc/libpldm/+/72202

Change-Id: Ieeb17d3e302b56e577f8a5306fd30e749273d3ff
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/extensions/openpower-pels/pldm_interface.cpp b/extensions/openpower-pels/pldm_interface.cpp
index 3326d82..a784e55 100644
--- a/extensions/openpower-pels/pldm_interface.cpp
+++ b/extensions/openpower-pels/pldm_interface.cpp
@@ -16,7 +16,7 @@
 #include "pldm_interface.hpp"
 
 #include <libpldm/base.h>
-#include <libpldm/file_io.h>
+#include <libpldm/oem/ibm/file_io.h>
 #include <systemd/sd-bus.h>
 #include <unistd.h>