UART clock rate is set to zero while disabling the uart clock for subsystem restart feature. It is required to set the uart clock rate to 7372800 Hz while enabling UART clock. Hence use uart_change_pm in serial core to call msm_hsl_power api to achieve the same. Signed-off-by: Mayank Rana <mrana@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>