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After the UFS device VCC is powered off, all the UFS device manufacturers require a minimum of 1ms of power-off time before VCC can be powered on again. This requirement has been verified with all the UFS device manufacturer's datasheets. Replace the hard coded 5ms delay with a variable with a default setting of 2ms to improve the system resume latency. The platform drivers can override this setting as needed. Signed-off-by: Bao D. Nguyen <quic_nguyenb@quicinc.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/72fa649406a0bf02271575b7d58f22c968aa5d7e.1760383740.git.quic_nguyenb@quicinc.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>