AP_HAL_FLYMAPLE: SPI: adapt to the new signature of transaction()

A default behaviour was added here.

libraries/AP_HAL_FLYMAPLE/SPIDriver.cpp

@@ -48,7 +48,7 @@ AP_HAL::Semaphore* FLYMAPLESPIDeviceDriver::get_semaphore()
     return &_semaphore;
 }
 
-void FLYMAPLESPIDeviceDriver::transaction(const uint8_t *tx, uint8_t *rx, uint16_t len)
+bool FLYMAPLESPIDeviceDriver::transaction(const uint8_t *tx, uint8_t *rx, uint16_t len)
 {
     cs_assert();
     if (rx == NULL) {
@@ -61,6 +61,7 @@ void FLYMAPLESPIDeviceDriver::transaction(const uint8_t *tx, uint8_t *rx, uint16
         }
     }
     cs_release();
+    return true;
 }
 
 

libraries/AP_HAL_FLYMAPLE/SPIDriver.h

@@ -29,7 +29,7 @@ public:
     FLYMAPLESPIDeviceDriver();
     void init();
     AP_HAL::Semaphore* get_semaphore();
-    void transaction(const uint8_t *tx, uint8_t *rx, uint16_t len);
+    bool transaction(const uint8_t *tx, uint8_t *rx, uint16_t len);
 
     void cs_assert();
     void cs_release();