AP_HAL_ChibiOS: remove debug print when SPI device not found

libraries/AP_HAL_ChibiOS/SPIDevice.cpp

@@ -320,7 +320,6 @@ SPIDeviceManager::get_device(const char *name)
         }
     }
     if (i == ARRAY_SIZE(device_table)) {
-        printf("SPI: Invalid device name: %s\n", name);
         return AP_HAL::OwnPtr<AP_HAL::SPIDevice>(nullptr);
     }