drivers: ipm: set IPM_STM32_HSEM default from the device tree

Change IPM_STM32_HSEM Kconfig definition so that it picks the correct
default automatically depending on which cpu node is enabled in the
device tree, rather than relying on board specific Kconfig overrides.

Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
4 files changed