move gpio.h to drivers/gpio.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The EFM32 Pearl Gecko Starter Kit contains sensors and
peripherals demonstrating the usage of the EFM32PG MCU
family. This patch adds basic support for this board
and is copied from EFM32WG-STK3800.
Signed-off-by: Gil Benkö <gil.benkoe@pm.me>
Signed-off-by: Christian Taedcke <hacking@taedcke.com>