mmc: tegra: enable MMC_CAP2_HS533.

mmc: tegra: enable MMC_CAP2_HS533.

Enable MMC_CAP2_HS533, if enable_hs533_mode is true.
Return parent max rate if desired rate is greater than
parent max rate.

Signed-off-by: Naveen Kumar Arepalli <naveenk@nvidia.com>
Reviewed-on: http://git-master/r/601057

Change-Id: I1998ab299cebc1907590b19908ed4c266e05dd80
Signed-off-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Reviewed-on: http://git-master/r/739654
Reviewed-by: Automatic_Commit_Validation_User