drm/connector: hdmi: Add RGB Quantization Range to the connector state

drm/connector: hdmi: Add RGB Quantization Range to the connector state

HDMI controller drivers will need to figure out the RGB range they need
to configure based on a mode and property values. Let's expose that in
the HDMI connector state so drivers can just use that value.

Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-20-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>