Use __func__ macro for debug messages
Use __func__ macro for debug messages

Instead of having the function name hard-coded (it might change and we
forgot to update them in the debug output) we can use __func__ instead
and also shorter the line so we do not need to break it.
Found by checkpatch.

Signed-off-by: Stefan Schmidt <eb0877843acc39f8ef6f7269937dee931c372d23@osg.samsung.com>

Cascoda/ca8210-linux