Remove an old mistake of mine.  This has sneak in the code i sent to gonzo
at that time, but AFAIK it is only used on routerboards.

Enabling GPIO_FUNC_SPI_CS[1|2]_EN will claim the use of gpio pins 0 and 1
respectivelly for use as SPI CS pins.

When really needed, this can still be enabled on kernel hints using the
function_set and function_clear knobs.
Fix document title.

Submitted by:	pluknet
Do not configure all pins as outputs as this can lead to short circuits when
the GPIO pin is connected to a push button (or other devices).

Instead keep the boot loader settings.

Calling ar71xx_gpio_pin_configure() with DEFAULT_CAPS was probably a
mistake and was causing all the pins to be set as outputs.
UDP-Lite uses SOCK_DGRAM, not SOCK_STREAM.