Revert "mmc: sdhci-msm: Disable CDR function on TX"

This reverts commit 4abb6960.

This is a preparation change for merging android-4.14-p.95 into msm-4.14
branch.

Equivalent logic is presented already into msm-4.14 with changes [1].
They are originally added into msm-4.9 and then imported into msm-4.14
with change [2].

[1]
  210c230 mmc: sdhci: Dont enable CDR for tuning commands
  9dca7d7 mmc: sdhci: Add new callback to enable/disable CDR
[2]
  a8b2b7e5 mmc: Merge MMC driver's changes from kernel msm-4.9 to msm-4.14

Change-Id: Ic013175dcf866a3f5f5fd21197f49b8437b5abc1
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>