mmc: host: sdhci-msm: Configure dll-user-control in dll init sequence

With SDCC v5.1.0, additional setting needed for enabling DLL output.
The dll-user-control register need to be configured during dll
initialization for getting proper dll output.

Without this configuration, we don't get the DLL lock status properly.

Change-Id: Ic9e15e5ad8ccec515430035140d9580039721b20
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>