Revert "serial: stm32: select pinctrl state in each suspend/resume function"

This reverts commit c70669ecef as it
breaks the build.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Bich Hemon <bich.hemon@st.com>
Cc: Erwan Le Ray <erwan.leray@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/stm32-usart.c

@@ -1295,8 +1295,6 @@ static int stm32_serial_suspend(struct device *dev)
 	else
 		stm32_serial_enable_wakeup(port, false);
 
-	pinctrl_pm_select_sleep_state(dev);
-
 	return 0;
 }
 
@@ -1304,8 +1302,6 @@ static int stm32_serial_resume(struct device *dev)
 {
 	struct uart_port *port = dev_get_drvdata(dev);
 
-	pinctrl_pm_select_default_state(dev);
-
 	if (device_may_wakeup(dev))
 		stm32_serial_enable_wakeup(port, false);