drm/debugfs: drop unneeded DEBUG_FS guard

The Makefile enables/disables the file compilation depending on
CONFIG_DEBUG_FS.

Signed-off-by: Dario Binacchi <[e-mail]>
Reviewed-by: Jani Nikula <[e-mail]>
Signed-off-by: Jani Nikula <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_debugfs.c

···
 #include "drm_crtc_internal.h"
 #include "drm_internal.h"
 
-#if defined(CONFIG_DEBUG_FS)
-
 /***************************************************
  * Initialization, etc.
  **************************************************/
···
 	debugfs_remove_recursive(encoder->debugfs_entry);
 	encoder->debugfs_entry = NULL;
 }
-
-#endif /* CONFIG_DEBUG_FS */