GPIO configuration flags will move and some that used to be in the low
8 bits are now higher, resulting in implicit constant conversion
overflows.  Use a boolean data type to hold boolean values.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>

This commit makes following changes to GPIO dt-bindings flags:
- Added GPIO_DIR_OUT_LOW, GPIO_DIR_OUT_HIGH flags to initialize output
  in low or high state.
- Added GPIO_ACTIVE_LOW, GPIO_ACTIVE_HIGH to indicate pin active state.
- Added GPIO_OPEN_DRAIN, GPIO_OPEN_SOURCE to configure single ended pin
  driving mode.
- reworked GPIO_INT_* flags to configure pin interrupts.
- following flags were deprecated: GPIO_DS_DISCONNECT_*, GPIO_INT,
  GPIO_INT_ACTIVE_*, GPIO_INT_DOUBLE_EDGE, GPIO_INT_DEBOUNCE,
  GPIO_POL_*.

Fixes zephyrproject-rtos#10339

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>

New gpio.h DT bindings are based on Linux implementation. Old,
deprecated GPIO flags have been changed to the current equivalent.
- added GPIO_ACTIVE_LOW, GPIO_ACTIVE_HIGH to indicate pin active state
- GPIO_INT_ACTIVE_LOW changed to GPIO_INT_LOW
- GPIO_INT_ACTIVE_HIGH changed to GPIO_INT_HIGH

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>

Update gpio_pin_configure() to take into account GPIO flags defined by
the devicetree.

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>

GPIO flags have been updated to match Linux implementation. Added open
drain, open source output configuration. Support for GPIO_ACTIVE_*
flags.

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>

GPIO flags have been updated to match Linux implementation. Support
for GPIO_ACTIVE_*, GPIO_OUTPUT_INIT_* flags.

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>