tty: serial: qcom_geni_serial: Fix the UART wakeup issue

tty: serial: qcom_geni_serial: Fix the UART wakeup issue

As a part of system suspend uart_port_suspend is called from the
Serial driver, which calls set_mctrl passing mctrl as 0. This
makes RFR high(NOT_READY) during suspend.

Due to this BT SoC is not able to send wakeup bytes to UART during
suspend. Include if check for non-suspend case to keep RFR low
during suspend.

Signed-off-by: satya priya <skakit@codeaurora.org>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1599742438-16811-5-git-send-email-skakit@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>