mmc: core: expose MMC_CAP2_NO_* to dt

The reason for why we expose these to dt is that some of
the controller is unable to send special cmd type due to
the hw limitation.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>