Revert "platform: msm_shared: Enable purge operation after unmap is done"
Revert "platform: msm_shared: Enable purge operation after unmap is done"

Purge command times outs and never succeeds. After purge times out the
ufs card goes into bad state and cannot be recovered. This could be
issues with the cards of a particular vendor, reverting the purge
operation for now until the issue with the card is fixed.

This reverts commit dbe1ab85e7b922406aa9ea8fb3d22f180dae5c95.

Change-Id: I2f30b60fd09bf00cc12b950eb18057f7e4422cd3

efidroid/lk,efidroid/lk,efidroid/lk,efidroid/lk,efidroid/lk,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,CanarySolutions/little-kernel