drm/radeon: Remove trailing whitespaces

Fix coding style. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20230111130206.29974-10-tzimmermann@suse.de

drivers/gpu/drm/radeon/radeon_legacy_crtc.c

@@ -322,7 +322,7 @@ static void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
 	 */
 	if (rdev->flags & RADEON_SINGLE_CRTC)
 		crtc_ext_cntl = RADEON_CRTC_CRT_ON;
-	
+
 	switch (mode) {
 	case DRM_MODE_DPMS_ON:
 		radeon_crtc->enabled = true;