The olimex-efm32g880f128-stk now defaults to use LEUART1 as the serial console.  Also fixes lots of compile bugs from the original LEUART checkin

initializing

As long as the method up_spiinitialize recognized the initialized state of the
spi device by the spi enable flag of the cr1 register, it isn't safe to disable
the spi device outside of the nuttx spi interface structure. But this has to be
done as long as the nuttx spi interface doesn't support bidirectional data
transfer for multiple devices share one spi bus. This wrapper store the
initialized state of the spi device after the first initializing and should be
used by each driver who shares the spi5 bus.

Note! Understand this as temporary workaround.

Signed-off-by: Marco Krahl <ocram.lhark@gmail.com>

This adds a new default platform configuration to support the lcd device
connected to the stm32f429i-disco board.

Signed-off-by: Marco Krahl <ocram.lhark@gmail.com>

This enables build and configuration of the ili9341 lcd interface driver.

Signed-off-by: Marco Krahl <ocram.lhark@gmail.com>

This enables build and configuration of the ili94314ws sub driver.

Signed-off-by: Marco Krahl <ocram.lhark@gmail.com>

This enables the initializing of the lcd device connected on the
stm32f429i-disco. The following methods are provided:
- up_lcdinitialize
- up_lcduninitialize
- up_lcdgetdev

The corresponding ili9341 lcd device in the nuttx driver section can be
configured by Kconfig. Interface 0 is used by default.

Signed-off-by: Marco Krahl <ocram.lhark@gmail.com>

This implements the lcd interface to displaying data on the lcd display powered
by the ili9341 lcd driver.

This driver implements all methods defined in the lcd_dev_s structure except
getcontrast and setcontrast. They are not supported by the hardware.

Furthermore the driver allows to use multiple displays powered by the ili9342 IC
with only one driver instance. So it is theoretically possible to support more
than one connected ili9341 lcd display. The displays can be configured
independently. Currently two lcd devices supported. This should be enough for
now. Read the corresponding code section of how to add more devices if
neccessary.

The following settings are configurable:

1. Pixel format
   Define the pixel format of the connected display. Currently only
   RGB-565 supported.

2. Orientation
   Define the orientation of the display. This can be portrait or
   landscape and reversed values.

1. Write only
   The driver allows to disable any getrun method if not neccessary to
   reduce code size. This is done by enable CONFIG_LCD_NOGETRUN in the nuttx
   configuration.

Signed-off-by: Marco Krahl <ocram.lhark@gmail.com>