mmc: tegra: Retuning on card-detect call back

mmc: tegra: Retuning on card-detect call back

-Disable regulators when card is removed and enable
when card is inserted through card_event api()
- Set tuning_status with retune if card is removed since
tuning should be performed for the new card inserted

Bug 200219827

Change-Id: If71c5970032f8a7544b15d9f48dea754ef996f44
Signed-off-by: Anubhav Jain <anubhavj@nvidia.com>
Signed-off-by: R Raj Kumar <rrajk@nvidia.com>
Reviewed-on: http://git-master/r/1182707
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>