There are different IPC driver modules in the kernel that are actively
maintained by Siemens but not yet listed in the MAINTAINERS file.
Add the missing entries.

Signed-off-by: Gerd Haeussler <gerd.haeussler.ext@siemens.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230814073114.2885-1-haeussler.gerd@gmail.com


Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>