drm/crtc: Drop no_vblank bit field

The no_vblank field in drm_crtc_state is defined as a bit-field with a
single bit.

This will create a syntax issue with the macros we'll introduce next,
and most other booleans but the *_changed ones in drm_crtc_state do not
use a bit field anyway.

Let's drop it.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250902-drm-state-readout-v1-11-14ad5315da3f@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250902-drm-state-readout-v1-11-14ad5315da3f@kernel.org