scsi: ufs: qcom: Use ufshcd_rmwl() where applicable

Instead of using both ufshcd_readl() and ufshcd_writel() to read/modify/
write a register, let's make use of the existing helper.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20231208065902.11006-17-manivannan.sadhasivam@linaro.org


Tested-by: Andrew Halaney <ahalaney@redhat.com> # sa8775p-ride
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>