drm/radeon: Drop CONFIG_BACKLIGHT_CLASS_DEVICE ifdefs

The DRM_RADEON Kconfig code contains:

	select BACKLIGHT_CLASS_DEVICE

So the condition these ifdefs test for is always true, drop them.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/atombios_encoders.c

@@ -141,8 +141,6 @@ atombios_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level)
 	}
 }
 
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
-
 static u8 radeon_atom_bl_level(struct backlight_device *bd)
 {
 	u8 level;
@@ -286,18 +284,6 @@ static void radeon_atom_backlight_exit(struct radeon_encoder *radeon_encoder)
 	}
 }
 
-#else /* !CONFIG_BACKLIGHT_CLASS_DEVICE */
-
-void radeon_atom_backlight_init(struct radeon_encoder *encoder)
-{
-}
-
-static void radeon_atom_backlight_exit(struct radeon_encoder *encoder)
-{
-}
-
-#endif
-
 static bool radeon_atom_mode_fixup(struct drm_encoder *encoder,
 				   const struct drm_display_mode *mode,
 				   struct drm_display_mode *adjusted_mode)

drivers/gpu/drm/radeon/radeon_acpi.c

@@ -391,7 +391,6 @@ static int radeon_atif_handler(struct radeon_device *rdev,
 
 			radeon_set_backlight_level(rdev, enc, req.backlight_level);
 
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
 			if (rdev->is_atom_bios) {
 				struct radeon_encoder_atom_dig *dig = enc->enc_priv;
 				backlight_force_update(dig->bl_dev,
@@ -401,7 +400,6 @@ static int radeon_atif_handler(struct radeon_device *rdev,
 				backlight_force_update(dig->bl_dev,
 						       BACKLIGHT_UPDATE_HOTKEY);
 			}
-#endif
 		}
 	}
 	if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {

drivers/gpu/drm/radeon/radeon_legacy_encoders.c

@@ -318,8 +318,6 @@ radeon_legacy_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 leve
 	radeon_legacy_lvds_update(&radeon_encoder->base, dpms_mode);
 }
 
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
-
 static uint8_t radeon_legacy_lvds_level(struct backlight_device *bd)
 {
 	struct radeon_backlight_privdata *pdata = bl_get_data(bd);
@@ -488,19 +486,6 @@ static void radeon_legacy_backlight_exit(struct radeon_encoder *radeon_encoder)
 	}
 }
 
-#else /* !CONFIG_BACKLIGHT_CLASS_DEVICE */
-
-void radeon_legacy_backlight_init(struct radeon_encoder *encoder)
-{
-}
-
-static void radeon_legacy_backlight_exit(struct radeon_encoder *encoder)
-{
-}
-
-#endif
-
-
 static void radeon_lvds_enc_destroy(struct drm_encoder *encoder)
 {
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

drivers/gpu/drm/radeon/radeon_mode.h

@@ -281,15 +281,11 @@ struct radeon_mode_info {
 
 #define RADEON_MAX_BL_LEVEL 0xFF
 
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
-
 struct radeon_backlight_privdata {
 	struct radeon_encoder *encoder;
 	uint8_t negative;
 };
 
-#endif
-
 #define MAX_H_CODE_TIMING_LEN 32
 #define MAX_V_CODE_TIMING_LEN 32