Revert "mmc: sdhci-msm: Update DDR_CONFIG reg with HSR value if supplied"

This reverts commit 99d7f96c.

This is a suspected change that's breaking suspend/resume in mainline.
Hence, revert this until the issue is fixed.

Change-Id: I6fbb06f2025c365ea3bd181a8d8fdb7a37f244b3
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>