drm: Don't hardcode the function name in debug logs

Switch to using the __func__ parameter instead of hardcoding a function name in the format string

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: alchark

platform/drm/cog-platform-drm.c

@@ -1296,7 +1296,7 @@ init_input(CogDrmPlatform *platform)
     if (!seat_name || !*seat_name)
         seat_name = "seat0";
 
-    g_debug("init_input: assigning libinput to seat '%s'", seat_name);
+    g_debug("%s: assigning libinput to seat '%s'", __func__, seat_name);
 
     int ret = libinput_udev_assign_seat(input_data.libinput, seat_name);
     if (ret)