ksp5012: add adxl345 support

Signed-off-by: Serah Peterson <speterson@phytec.com>
Merge pull request #1 from rdrjr/WIP/speterson@phytec.com/phytec-ksp5012-accelerometer

ksp5012: add adxl345 support
ksp5012: gps: initial Telit JF2 implementation

The UART is set up to ignore overrun errors since there is no parity
checking. The GPS device sends messages in 1-sec intervals, and since
it is capable of using 1 or 2 stop bits, overrun errors appear occasionally
but do not affect operation.

The GPS UART/device is currently operating at 9600 baud with 8-bit data, no
parity, and 2 stop bits.

Signed-off-by: Russell Robinson <rrobinson@phytec.com>