scsi: ufs: ufs-qcom-ice: Initialize local variable in ice_cfg_start()

Previously local variable ice_set in ufs_qcom_ice_cfg_start() function
was initialized only if qcom_host->ice.vops->config_start was set.
If that was not set, then the uninitialized value of ice_set might have
lead to incorrect configuration of ICE.
So initialize the variable regardless the value of config_start.

Change-Id: I16692902d9f5b8df00ae2ffc7c363413d13e932a
Signed-off-by: Siba Prasad <sibap@codeaurora.org>