Fixed SPI driver init function not clearing SPI2X bit when not needed.

Fixed PREVENT ALLOW MEDIUM REMOVAL command issuing in the MassStorageHost demo using incorrect parameters (thanks to Mike Alex).

Fixed MassStorageHost demo broken due to an incorrect if statement test in MassStore_GetReturnedStatus().

Demos/Host/MassStorageHost/MassStoreCommands.h

@@ -109,10 +109,9 @@
 		 */
 		typedef struct
 		{
-			unsigned char ReponseCode         : 7;
-			unsigned char Valid               : 1;
-			
-			uint8_t      SegmentNumber;
+			uint8_t       ReponseCode;
+
+			uint8_t       SegmentNumber;
 			
 			unsigned char SenseKey            : 4;
 			unsigned char _RESERVED1          : 1;