FROMLIST: scsi: ufs: Use ufshcd_config_pwr_mode() when scale gear

When scale gear, use ufshcd_config_pwr_mode() instead of
ufshcd_change_power_mode() so that vops_pwr_change_notify(PRE_CHANGE)
can be utilized to allow vendors use customized settings before change
the power mode.

Bug: 150731199
Link: https://lore.kernel.org/linux-scsi/1581485910-8307-2-git-send-email-cang@codeaurora.org/


Change-Id: I8c8602b8ce3fd9fa4644e126fbd84bf564bf11e7
Signed-off-by: Can Guo <cang@codeaurora.org>