media: dt-bindings: mipi,ccs: Add vcore and vio supplies

Vcore and vio supplies are also part of the spec and used by many sensors.
Do not specify the voltages as they are generally sensor dependent.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>