boards: add new spi+i2c config

Chip-select and SPI initialization uses the new config, whereas the drivers
still use the existing defines.

The configuration in board_config.h can be removed after all drivers are
updated.

src/lib/drivers/device/posix/I2C.hpp

@@ -41,6 +41,7 @@
 #define _DEVICE_I2C_H
 
 #include "../CDev.hpp"
+#include <px4_platform_common/i2c.h>
 
 namespace device __EXPORT
 {

src/lib/drivers/device/posix/SPI.hpp

@@ -41,6 +41,7 @@
 #define _DEVICE_SPI_H
 
 #include "../CDev.hpp"
+#include <px4_platform_common/spi.h>
 
 #ifdef __PX4_LINUX