Add enums for 10bit color formats

To improve wide-color behavior it's useful to have more bits
per color component. This defines 10:10:10:2 and 10:10:10:X
for that use.
This can be used for any color space / dataspace that is
compatible with unsigned integer components, e.g. Display-P3,
BT2020, etc.
Test: TBD

Change-Id: I69647f6bb2d5b0666a0819b10ee42705361e267d