scsi: ufs-qcom: Force probe of ufs based on boolean property

Force probing the ufs device even if it is not the bootdevice based on
device tree property "force-ufshc-probe".
This enables the embedded ufs device for other usecases even when board
is not using UFS for boot.

Change-Id: I8e959fd9bdb810d2dcd6c793a9c7dfbfcd66eaaa
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>