i2c_spi_buses: add support for multiple instances of the same device on a bus

This also simplifies the API a bit, since we anyway have to change the
drivers to pass additional information (the bus device index).

The orientation flag is merged with the rotation.

src/lib/drivers/device/qurt/I2C.cpp

@@ -44,6 +44,8 @@
 
 #include <dev_fs_lib_i2c.h>
 
+#include <px4_platform_common/i2c_spi_buses.h>
+
 namespace device
 {
 
@@ -58,6 +60,11 @@ I2C::I2C(uint8_t device_type, const char *name, const int bus, const uint16_t ad
 	_device_id.devid_s.address = address;
 }
 
+I2C::I2C(const I2CSPIDriverConfig &config)
+	: I2C(config.devid_driver_index, config.module_name, config.bus, config.i2c_address, config.bus_frequency)
+{
+}
+
 I2C::~I2C()
 {
 	if (_fd >= 0) {