drm/tilcdc: Remove redundant #endif/#ifdef in debugfs code

drm/tilcdc: Remove redundant #endif/#ifdef in debugfs code

Remove the unnecessary #endif/#ifdef CONFIG_DEBUG_FS pair that splits
the debugfs code section. This keeps all debugfs-related code within a
single preprocessor conditional block, improving code readability.

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Kory Maincent (TI.com) <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20260123-feature_tilcdc-v5-9-5a44d2aa3f6f@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>