mmc: host: sdhci: Add new host_op for clearing ice configuration

Add new host op for clearing ice configuration.
This config_end host op need to invoked for clearing ice configuration,
once mmc request processing is completed.

Change-Id: Ifc5569ae88748599b75ef5b3e625249ecd667762
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>