drm: fix whitespace in drm_plane_create_color_properties()

The drm_property_create_enum() call for "COLOR_RANGE" contains a tab
character in the middle of the argument list.

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220803204240.33409-1-contact@emersion.fr