Add support for UP board (www.up-board.org), scoping the following functions available via 40-pin header: * GPIO (via sysfs) * UART * I2C * SPI * PWM Validated on UP board v0.2, running ubilinux 3.0 Signed-off-by: Dan O'Donovan <dan@emutex.com> Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>