Support connection via SPI and keep I2C as the default. Jira: ZEP-1698 Change-Id: I42a76131577a37429375364deb07e451107f5d81 Signed-off-by: Dario Pennisi <dario@iptronix.com> Signed-off-by: Anas Nashif <anas.nashif@intel.com>