Convert the driver to use DT_INST_ defines, update all dependent dts,
soc and board files.
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
This commit adds the following:
- device tree bindings for Gecko watchdog driver
- EFM32PG SOC support for the watchdog driver
- EFM32PG board support for the watchdog driver
- DTS aliases for testing with default watchdog driver test
Signed-off-by: Oane Kingma <o.kingma@interay.com>