Patched for Audio example - Add status check when DFSDM's filter and channel de-init.

Dependents:   DISCO_F413ZH-AUDIO-demo

The base repository is https://os.mbed.com/teams/ST/code/BSP_DISCO_F413ZH/. I've just added workaround patch for Audio-in demo on DISCO_F413ZH board(Microphone U16, U17)

Revision:
1:a3f6b8b5a6bf
Parent:
0:4af3ca173992
Child:
3:42b354f5069c
--- a/Drivers/BSP/STM32F413H-Discovery/stm32f413h_discovery.h	Wed May 17 10:23:19 2017 +0200
+++ b/Drivers/BSP/STM32F413H-Discovery/stm32f413h_discovery.h	Wed May 17 14:00:44 2017 +0200
@@ -64,10 +64,10 @@
   */
 typedef enum 
 {
-LED3 = 0,
-LED_GREEN = LED3,
-LED4 = 1,
-LED_RED = LED4,
+  DISCO_LED3 = 0,                 //Patch for mbed
+  LED_GREEN = DISCO_LED3,         //Patch for mbed
+  DISCO_LED4 = 1,                 //Patch for mbed
+  DISCO_LED_RED = DISCO_LED4,     //Patch for mbed
 }Led_TypeDef;