drm/radeon: Do not include <drm/drm_legacy.h>

Including <drm/drm_legacy.h> is not required by radeon.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Reviewed-by: David Airlie <airlied@gmail.com>
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231122122449.11588-8-tzimmermann@suse.de

drivers/gpu/drm/radeon/radeon_drv.h

@@ -33,7 +33,6 @@
 
 #include <linux/firmware.h>
 #include <linux/platform_device.h>
-#include <drm/drm_legacy.h>
 
 #include "radeon_family.h"