boards: arm: Add u-blox EVK-ANNA-B1

Add support for u-blox EVK-ANNA-B1 which uses the nRF52832.

This board is similar to the nRF52dk_nrf52832 with
different pin assignments on the header pins and not having
the debug-in and shield SWD headers.

Tested with blinky, button, and Bluetooth peripheral_hr
Addressed review comments, including SW2
Rebased to pick up new board in test_adc.c - corrected typo
Reverted to sda-pin, scl-pin

Signed-off-by: Bob Recny <bob.recny@u-blox.com>