scsi: ufs-qcom: disable hibern8 during clk gating

There is no need to send hibern8 enter/exit during clk gate/ungate
when auto hibern8 is supported as that would be handled by the
controller, thus remove UFSHCD_CAP_HIBERN8_WITH_CLK_GATING cap.

Change-Id: Ica50975082b5071fafaa6a318c38e97afb7ba700
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>