TX2 NX platform: SD card on sdmmc3 is not work

…What is the problem here? I asked to add vmmc-supply to spmic_sd3 but not sd2.

Also, cd-gpios is already said to be removed and you need the non-removable.

We never said you can remove vmmc-supply and nvidia,always-on. That is why I told you do not change anything unless we asked you to change.