siemens/mc_apl1: Use Siemens NC FPGA driver

- use Siemens NC FPGA driver for backlight brightness and PWM control
- set Dsave time for board reset after falling edge of signal xdsave

Change-Id: I5077d4af162e54a3993e5e0d784a8356f51bd0c9
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/20161
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/mainboard/siemens/mc_apl1/Kconfig

@@ -7,6 +7,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select HAVE_ACPI_TABLES
 	select DRIVER_INTEL_I210
 	select USE_SIEMENS_HWILIB
+	select DRIVER_SIEMENS_NC_FPGA
 	select DRIVERS_I2C_RX6110SA
 	select DRIVERS_UART_8250IO