Lora: Add driver implementation inside DEVICE_SPI flag

These drivers uses SPI to communicate with radio so SPI must be present
when compiling these.

components/lora/SX126X/SX126X_LoRaRadio.cpp

@@ -22,6 +22,8 @@ Copyright (c) 2019, Arm Limited and affiliates.
 SPDX-License-Identifier: BSD-3-Clause
 */
 
+#if DEVICE_SPI
+
 #include <math.h>
 #include "ThisThread.h"
 #include "mbed_wait_api.h"
@@ -1337,3 +1339,4 @@ void SX126X_LoRaRadio::clear_device_errors(void)
     write_opmode_command((uint8_t) RADIO_CLR_ERROR, buf, 2);
 }
 
+#endif // DEVICE_SPI

components/lora/SX126X/SX126X_LoRaRadio.h

@@ -25,6 +25,8 @@ SPDX-License-Identifier: BSD-3-Clause
 #ifndef MBED_LORA_RADIO_DRV_SX126X_LORARADIO_H_
 #define MBED_LORA_RADIO_DRV_SX126X_LORARADIO_H_
 
+#if DEVICE_SPI
+
 #include "mbed_critical.h"
 #include "PinNames.h"
 #include "InterruptIn.h"
@@ -401,4 +403,6 @@ private:
     packet_params_t _packet_params;
 };
 
+#endif // DEVICE_SPI
+
 #endif /* MBED_LORA_RADIO_DRV_SX126X_LORARADIO_H_ */

components/lora/SX1272/SX1272_LoRaRadio.cpp

@@ -23,6 +23,8 @@ Copyright (c) 2017, Arm Limited and affiliates.
 SPDX-License-Identifier: BSD-3-Clause
 */
 
+#if DEVICE_SPI
+
 #include "SX1272_LoRaRadio.h"
 #include "sx1272Regs-Fsk.h"
 #include "sx1272Regs-LoRa.h"
@@ -2080,3 +2082,5 @@ void SX1272_LoRaRadio::handle_timeout_irq()
         }
     }
 }
+
+#endif // DEVICE_SPI

components/lora/SX1272/SX1272_LoRaRadio.h

@@ -26,6 +26,8 @@ SPDX-License-Identifier: BSD-3-Clause
 #ifndef SX1272_LORARADIO_H_
 #define SX1272_LORARADIO_H_
 
+#if DEVICE_SPI
+
 #include "PinNames.h"
 #include "InterruptIn.h"
 #include "DigitalOut.h"
@@ -435,4 +437,6 @@ private:
     void handle_timeout_irq();
 };
 
+#endif // DEVICE_SPI
+
 #endif /* SX1272_LORARADIO_H_ */

components/lora/SX1276/SX1276_LoRaRadio.cpp

@@ -22,6 +22,8 @@ Copyright (c) 2017, Arm Limited and affiliates.
 SPDX-License-Identifier: BSD-3-Clause
 */
 
+#if DEVICE_SPI
+
 #include "PinNames.h"
 #include "platform/Callback.h"
 #include "platform/mbed_wait_api.h"
@@ -2268,4 +2270,7 @@ void SX1276_LoRaRadio::handle_timeout_irq()
         }
     }
 }
+
+#endif // DEVICE_SPI
+
 // EOF

components/lora/SX1276/SX1276_LoRaRadio.h

@@ -26,6 +26,8 @@ SPDX-License-Identifier: BSD-3-Clause
 #ifndef SX1276_LORARADIO_H_
 #define SX1276_LORARADIO_H_
 
+#if DEVICE_SPI
+
 #include "PinNames.h"
 #include "InterruptIn.h"
 #include "DigitalOut.h"
@@ -446,4 +448,6 @@ private:
     void handle_timeout_irq();
 };
 
+#endif // DEVICE_SPI
+
 #endif // SX1276_LORARADIO_H_