Attempt to speed up drive reading by doing larger block reads - didn't help very much. we need to support async reads, I think.

Also delete some copypasta in DriveBlob - it already inherits those functions so it doesn't need them itself.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2368 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/DiscIO/Src/DriveBlob.h

@@ -48,14 +48,10 @@ public:
 	~DriveReader();
 	u64 GetDataSize() const { return size; }
 	u64 GetRawSize() const { return size; }
-	bool Read(u64 offset, u64 nbytes, u8* out_ptr);
-	const u8 *GetBlockData(u64 block_num);
 
+	virtual bool ReadMultipleAlignedBlocks(u64 block_num, u64 num_blocks, u8 *out_ptr);
 };
 
-
-
-
 }  // namespace
 
 #endif  // _DRIVE_BLOB_H