AP_HAL_Linux: added deinit logic for RCInput_Navio

DMA needs to be stopped if a panic occurs.

libraries/AP_HAL_Linux/RCInput_Navio.cpp

@@ -411,6 +411,11 @@ LinuxRCInput_Navio::~LinuxRCInput_Navio()
     delete con_blocks;
 }
 
+void LinuxRCInput_Navio::deinit()
+{
+    stop_dma_and_exit(0);
+}
+
 //Initializing necessary registers
 void LinuxRCInput_Navio::init_registers()
 {

libraries/AP_HAL_Linux/RCInput_Navio.h

@@ -126,6 +126,7 @@ private:
     static void stop_dma_and_exit(int param);
     void set_sigaction();
     void set_physical_addresses(int version);
+    void deinit() override;
 
 };